Otters are a part of the family Lutrinae's keystone species. A subgroup of weasels is the lutrinae. The human acts that can guarantee the sea otter's survival in the environment are to establish inside the Atlantic X.
Who are some examples of these species?The majority of people describe biodiversity in terms of species, a grouping of singular living beings capable of interbreeding. Wildlife examples include the white-tailed deer, white pine woods, sunflowers, tiny microbes that are even too small to be seen with the human eye, blue whales, or white-tailed deer.
Are people a species?One species, Homo , makes up the billions of people on earth today. Similar to other species, humans vary among themselves in terms of everything from shape and size through skin tone or eye color. However, there are many more things that we have in common than those that separate us.
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if a cell at metaphase of mitosis contains 20 sister chromatids, how many chromosomes will be present in a somatic cell?
If a cell at metaphase of mitosis which contains 20 sister chromatids, Then, there will be 10 pairs of chromosomes will present in a somatic cell.
The normal number of chromosomes in a cell is 10 and there are usually 5 pairs of chromosomes. Since there are now 20 chromatids, duplication has occurred and they should become two identical pairs (sister chromatids). Therefore, there are 10 centromeres. If there are 20 centromeres in anaphase, there are 20 chromosomes in the dividing cell. As a result, each terminal pole of a dividing cell acquires 10 chromatids and each chromatid becomes a chromosome of the cell at the metaphase. After division, each chromosome consists of only one chromatid, a total of 23 chromatids. When a fertilized egg is formed during sperm-egg fusion, the final cell is diploid and contains 46 chromosomes (23 from each gamete).
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when standing still in front of a closed door and pushing on it without it moving, the muscle action/tension is called:
Answer:
KINESIOLOGY: TYPES OF MUSCLE CONTRACTIONS: Eccentric Contraction: The eccentric contraction plays a very important role in controlling and stopping movement and in preparing the muscles for an explosive type contraction.
True or false. In the muscles of the limbs, the origin is usually the immobile muscle attachment.
In the muscles of the limbs, the origin is usually the immobile muscle attachment. True.
What is immobile muscle attachment?
Skeletal muscles have two or more points of attachment to bone, or occasionally to other muscles or tissues. The attachment is said to as having an origin if the location is a bone that is stationary during an action. The attachment is referred to be an insertion if the location is on the bone that moves during the motion.
The insertion tendon is coupled to a more mobile position than the origin tendon, which is fixed.
The muscle's origin is the end attached to a fixed (stabilized) bone, while the muscle's movable end that joins to the bone being tugged is referred to as the muscle's insertion.
The body is moved in space by the muscles that surround synovial joints. These skeletal movements frequently.
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You continue studying the cells of an organism and identify the next structure as the cell wall. You read that the cell wall is composed of macromolecules that can be broken down into smaller molecules that are used by the mitochondria to provide energy for the cell.
Explain what you determined were the principle macromolecules found in the cell wall. Name the monomer / polymer. REMEMBER CELL WALL = PLANT
PLEASE ANSWER ASAP and give an explanation along with an explanation to the question. I’m kind of confused on what the question is asking. The best answer will get Brainliest!!
Plant cell walls are composed of cellulose while fungal cell walls are composed of chitin.
Plant cells are composed of what?The Plant cell walls has been composed of the cellulose while the fungal cell walls has been composed of chitin. Both the compounds such as the carbohydrate polymers, but they are composed of the different monomers.
The cellulose of the plant cell walls has a polysaccharide of glucose. The chitin of insect exoskeletons and fungal cell walls, is also a polysaccharide: a linear polymer of a sugar derivative called N-acetylglucosamine.
Therefore, Plant cell walls are composed of cellulose while fungal cell walls are composed of chitin.
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why are neurotransmitters necessary at the neuromuscular junction
Neurotransmitters are required at the neuromuscular junction to initiate a new nerve impulse along the membrane of the muscle fiber and therefore make the muscles contract.
Neurotransmitters are the chemical messengers that help in transmitting electrical impulses to and from the brain by means of nerve cells. The electrical impulse is transmitted from one neuron to another by conversion into the chemical form by means of neurotransmitters.
Muscles are the loose masses of tissues that provide a definite shape to the body and also support the organs inside the body. The human body is composed of three types of muscles: skeletal muscles, smooth muscles and cardiac muscles.
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jim is lifting weights. holding a 20lb weight down by his side, he bends his arm at the elbow, contracting his bicep, and holds the position until he reaches muscle fatigue. according to the henneman size principle in what order will his muscle fibers be recruited?
According to Henneman's size principle, Jim's muscle (when He lifting weights, holding a 20lb weight down by his side, he bends his arm at the elbow, contracting his bicep, and holds the position until he reaches muscle fatigue) recruited in order of size when under load. This means that slower, lower force, more fatigue-resistant muscle fibers are recruited before faster, higher force, less fatigue-resistant muscle fibers.
The foundation for size-ordered activation or recruitment of motor units during movement is Henneman's size principle, which links the input and output characteristics of motoneurons and their muscle fibers to size. Regardless of whether the muscles are self- or cross-reinnervated by the regenerated axons, after nerve injury and surgical repair, the link between motoneuron size and the number and size of the muscle fibers that the motoneuron reinnervates is initially lost but returns over time.
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The table above shows the nutritional information in a bottle of pop. Drinking 16 oz of this beverage would provide which of the following?
30% of the total carbohydrates for a person on a 2,000 calorie diet will provide if drinking 16 oz of this beverage.
What are carbohydrates?
Carbohydrates are macronutrients that provide energy to our bodies in three ways. Carbohydrates are vital at every stage of life. They're the body's primary source of energy and the brain preferred energy source.
Carbohydrate-containing foods are converted into glucose or blood sugar by the digestive system during the digestion process.
Therefore Carbohydrates are broken down by the body into glucose – a type of sugar. Glucose is used as fuel by your body's cells, tissues, and organs.
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What do we call specific sequences of genetic material that code for a trait?
answer choices
Phenotype
Genotype
Nuclei
Mitochondria
specific sequences of genetic material that code for a trait is called as Genotype. it can also be called as alleles or variant forms of gene.
For dominant and recessive alleles, respectively, in discussions of genotype, biologists employ capital letters. For example, "B" denotes a blue allele and "b" denotes a brown allele in terms of eye color. A homozygous dominant genotype describes an organism that possesses two dominant alleles for a certain trait. In the case of the eye color, this genotype is denoted by the letter BB. It is referred to as having a heterozygous genotype when an organism possesses both a dominant and a recessive allele. This genotype is denoted by the letters Bb in our example. Last but not least, homozygous recessive refers to a genotype in which an organism possesses two recessive alleles. This genotype is denoted as bb in the example with the eye color.
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Question 6
Green peas are dominant to yellow peas. A yellow pea plant crosses with a green pea plant and 100% of the offspring
are green. What must be the genotypes of the parents?
A. Gg x Gg
B. GG x gg
C. gg x gg
D. Gg x gg
50% of the offspring will have a Gg phenotype and 50% will have gg phenotype.
What are genotypes?The type of variant present at a specific locus (i.e., region) in the genome is scored by what is known as a genotype. Symbols can be used to symbolise it. For illustration, BB, Bb, and bb could be used to denote a certain gene variant. The universally compatible genotype, genotype AA, ensures that no matter who they mate with, they will never give birth to a child who has sickle cell disease. The compatible and incompatible genotypes are listed below: AA and AA are complementary. AA and AS are complementary. AA and SS go together.The genotypes that could result from the cross are green and yellow.Gg and gg phenotypes will each make up half of the offspring.To learn more about genotypes refer to:
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Causes of treatable dementia include all of the following EXCEPTO vitamin B-12 deficiencyO alcoholism. O depression. O Alzheimer's disease.
Treatable dementia is caused by a vitamin B-12 deficiency. Dementia is a word used to describe the decreased capacity to remembering, think, conduct make decisions rather than a specific disease.
Describe dementia.Dementia is a word used to describe the poor memory, thinking, or decision-making that interferes with performing daily tasks rather than a specific disease. As far as dementia goes, Vascular dementia the most prevalent. Despite the fact that dementia primarily affects older persons, it is not a natural aspect of aging.
Why does dementia develop?Alteration to this or loss of the brain's nerve cells as well as connections is what leads to dementia. Dementia can have varied effects on different people and produce distinct symptoms depending on the region of the brain which is affected.
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A friend says that this experimental design would be better if the researchers had injected the control group trees with a solution that was identical to that used in the experimental group, but without the fungus. Do you agree
Yes, I agree that it would be beneficial to inject the control group trees with a solution that is identical to that used in the experimental group, but without the fungus.
This would allow the researchers to compare the effects of the fungus on the experimental group to the effects of the solution itself on the control group, which would provide more accurate results.
This type of experimental design is essential for gaining a better understanding of the effects of the fungus on the trees. By having a control group that is injected with an identical solution to the experimental group, but without the fungus, the researchers can more accurately assess what impact the fungus itself is having. This would allow them to draw more reliable conclusions about the effects of the fungus on the trees.
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Which of the following is not a method used by taxonomists today to classify organisms?
Select one:
a.
Comparative anatomy & physiology
b.
Cell biology
c.
Comparative embryology
d.
Fossil record
Taxonomists are able to classify the organisms based on Comparative anatomy & physiology. Option A
What is taxonomy?When we talk about taxonomy, we have to think about the system that would allow us to be able to classify all the living organisms that we have in the universe. We know that the living things that we have fall into many different classes.
The question now would be, how exactly do we go about the classification of the organisms? If we are to do that we have to be able to devise a system that can be used and applied across the bboard and this is the idea of the use of taxonomy and it is based on the anatomy of the organism that we have to study.
The comparative anatomy of the organisms would tell us that they can be put into a category that is similar and thus they can be classed together in each case.
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Identify the structures of the kidney. Part A Drag the labels onto the diagram to identify the structures. Reset Help renal papilla renal pelvis renal vein ureter renal pyramids renal column Dodo minor calyx renal artery
The labels diagram to identify the structures of the kidney:
1. Renal column
2. Minor calyx
3. Renal artery
4. Renal vein
5. Renal papilla
6. Ureter
7. Renal pyramid
8. Renal column
The kidneys аre а pаir of beаn-shаped orgаns thаt аre found high in the bаck of the аbdominаl cаvity, just below the rib cаge; one on either side of the spine. The right kidney is slightly lower thаn the left becаuse of the position of the liver.
A kidney is divided into а dаrk outer аreа (the cortex) аnd аn inner lighter-coloured аreа (the medullа). Within the medullа there аre between 10 аnd 18 renаl pyrаmids; triаngulаr structures which hаve а striped аppeаrаnce. They hаve this аppeаrаnce becаuse of the renаl tubules аnd аssociаted blood vessels. The renаl cortex аnd the pyrаmids mаke up the renаl pаrenchymа. It is here thаt аpproximаtely one million nephrons аre the working centres of the kidneys.
Your question is incomplete, but your full question can be seen in the Attachment.
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Please explain what it means when we say photosynthesis and respiration are a cycle. you need to use the reactants (what is needed) and products (what is being made) to explain your answer. include the organelles involved. you could also discuss how photosynthesis and respiration are involved in keeping your body active. please write 5 sentences minimum to include all required information.
5 sentences minimum:
1.products/reactants photosynthesis
2.products/reactanats respiration
3.organelle-photosynthesis
4.organelle-respiration
5.what does it mean when we say photosynthesis and respiration are a cycle
pls help me!!!!
Answer:
In photosynthesis, reactants such as carbon dioxide and water are used to create products such as glucose and oxygen. In cellular respiration, glucose and oxygen are used as reactants to create products such as carbon dioxide and water. The organelle involved in photosynthesis is the chloroplast, which contains chlorophyll and other pigments that absorb sunlight to convert it into chemical energy. The organelle involved in cellular respiration is the mitochondria, which converts the chemical energy in glucose and oxygen into a form that cells can use. Photosynthesis and respiration are a cycle because they are interconnected and dependent on each other. The glucose produced during photosynthesis is used as a reactant in cellular respiration, while the oxygen produced during photosynthesis is used as a reactant in cellular respiration. The carbon dioxide and water produced during respiration are used as reactants in photosynthesis.
Which of the following would not characterize allopathic selection?
Answer:
yes
Explanation:
which suffix is found on both of the enzymes used in dna replication
In biochemistry, the name of an enzyme is formed using the suffix -ase. It can be present on both DNA replication enzymes.
The name of an enzyme is formed using the suffix -ase. The most typical way to name an enzyme is to append this suffix to the end of the substrate. For instance, an enzyme that breaks down peroxides may be termed peroxidase, and an enzyme that creates telomeres may be called telomerase. For example, the enzyme that polymerizes DNA into strands is called polymerase; see also reverse transcriptase. Enzymes are sometimes named for the function they carry out, rather than the substrate.
Helicase, an enzyme that breaks down double-stranded DNA into single strands so that each strand may be duplicated, and DNA polymerase III are the two key enzymes involved in DNA replication.
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according to model 2 what is the source of replacement electrons for those released from photosystem I
In accordance with Model 2, the source of the replacement electrons for those released from Photosystem 1 are electrons from Photosystem 2.
The energy store molecule ATP and the reduced electron carrier NADPH are two molecules produced by the light-dependent processes that are required for the next phase of photosynthesis. The thylakoid membranes of organelles referred to as chloroplasts are where the light responses occur in plants.
The light processes are crucially influenced by photosystems, sizable protein and pigment (light-absorbing molecule) complexes that are designed to capture light.
The two different kinds of photosystems are the PSI and the PSII (PSII).
Numerous pigments that aid in the absorption of light energy may be found in both photosystems, along with a unique pair of chlorophyll molecules that are located at the core (reaction center) of the photosystem. The unique pair of photosystem I is referred to as P700, while the unique pair of photosystem II is referred to as P680.
Energy is transferred from pigment to pigment inside of photosystem II when light is absorbed by one of the numerous pigments inside. This process continues until the reaction center is reached. An electron's energy is raised there, where it is transmitted to P680. An acceptor molecule receives the high-energy electron, which is then exchanged for an electron from water. The oxygen we breathe is released as the water splits.
When the electron reaches photosystem I, it joins the reaction center's P700 unique pair of chlorophylls. The electron in P700 is raised to a very high energy level and transferred to an acceptor molecule when light energy is absorbed by pigments and sent inward to the reaction site. The lost electron of the exceptional pair is replaced by an electron from PSII.
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Facilitated diffusion always requires a carrier protein.true or false
True. Facilitated diffusion is a type of passive transport that involves the movement of molecules or ions across a membrane using a carrier protein.
The carrier protein acts as a bridge between the molecule or ion and the membrane, allowing it to move more quickly and easily across the membrane. As such, facilitated diffusion always requires a carrier protein.
Transporter proteins can move a wide variety of molecules, such as sugars, amino acids, nucleic acids, ions and many other compounds across the membrane. This allows organisms to obtain essential nutrients and compounds, as well as to remove toxic substances from the body.
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a section of dna that holds the instructions for making a polypeptide ?
Gene is a section of dna that holds the instructions for making a polypeptide.
The genes in DNA encode protein molecules, which are the "workhorses" of the cellular, carrying out all of the capabilities necessary for lifestyles. as an instance, enzymes, which include those that metabolize nutrients and synthesize new cellular materials, in addition to DNA polymerases and different enzymes that make copies of DNA for the duration of cell department, are all proteins.
in the best sense, expressing a gene approach production its corresponding protein, and this multilayered system has most important steps. in the first step, the data in DNA is transferred to a messenger RNA (mRNA) molecule with the aid of manner of a process referred to as transcription. throughout transcription, the DNA of a gene serves as a template for complementary base-pairing, and an enzyme called RNA polymerase II catalyzes the formation of a pre-mRNA molecule, that is then processed to form mature mRNA (figure 1). The ensuing mRNA is a single-stranded reproduction of the gene, which next must be translated right into a protein molecule.
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Which of the following is paired incorrectly?
1. unit cell - the smallest repeating unit of the lattice
2. glass - amorphous solid
3. amorphous solids - considerable disorder in their structures
4. gold metal - simple cubic unit cell
5. crystalline solids - highly regular arrangement of their components
The option paired incorrectly is 4. Gold metal - simple cubic unit cell. Gold metal has a face-centered cubic unit cell. A simple cubic unit cell is one of the seven types of three-dimensional crystal structures, but it's not the same as face-centered cubic unit cell.
explain how the calcium transient differs between cardiac and skeletal muscle and how this influences contractility
The calcium transient is a process that occurs in both cardiac and skeletal muscle, but it differs in some key ways.
In cardiac muscle, the calcium transient is triggered by the release of calcium ions from the sarcoplasmic reticulum (SR), which is a specialized organelle that stores calcium ions. This release of calcium ions causes a brief increase in the concentration of calcium ions in the cytoplasm, which in turn triggers muscle contraction.In skeletal muscle, the calcium transient is triggered by the release of calcium ions from the SR, but it is also dependent on the release of calcium ions from the extracellular space. The release of calcium ions from the SR is triggered by the action potential that travels along the muscle fiber, while the release of calcium ions from the extracellular space is triggered by the binding of the neurotransmitter acetylcholine to the muscle cell membrane.What are the difference in both?The difference in the calcium transient between cardiac and skeletal muscle influences contractility, or the ability of the muscle to contract.
Cardiac muscle contractility is largely dependent on the amount of calcium ions released from the SR, while skeletal muscle contractility is dependent on both the amount of calcium ions released from the SR and the amount of calcium ions released from the extracellular space.
Additionally, cardiac muscle has a slower rate of relaxation, which allows for a more sustained contraction. Skeletal muscle has a faster rate of relaxation, which allows for a more rapid contraction and relaxation cycle.
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Good morning^^ 30 pts! Can someone please help me with my question? thank youuu
Think of ways in which scientists are presently challenging our ideas about the Universe?
Answer: How fast the universe is growing
Explanation: Scientists believe that our universe is constantly growing, but no scientists nor astronomers agree how fast
There are several ways in which scientists are currently challenging our ideas about the Universe:
Dark Matter and Dark Energy: Scientists have observed that the Universe contains much more matter than what can be accounted for by the visible matter we can see. This has led to the concept of dark matter and dark energy, which make up most of the Universe but remain mysterious and unobserved. Scientists are actively searching for evidence of these mysterious components of the Universe.Inflation Theory: The Inflation theory proposes that the universe underwent a rapid expansion in the first fraction of a second after the Big Bang. It explains the uniformity of the universe and is supported by recent observations of the cosmic microwave background radiation.The Multiverse Hypothesis: The multiverse hypothesis suggests that there may be multiple universes beyond our own, each with its own set of physical laws and characteristics. Some scientists have proposed that the multiverse may explain the existence of dark matter and dark energy, the values of physical constants, and the nature of the Big Bang.Quantum Mechanics and General Relativity: The laws of quantum mechanics and general relativity are the foundation of our current understanding of the nature of space-time and the behavior of matter. However, they are incompatible and scientists are trying to find a way to unify them in a theory of quantum gravity.The nature of black holes: Scientists have recently made observations of the event horizon of black holes and they were different from what they expected, leading to new questions about the nature of black holes.
These are just a few examples of how scientists are currently challenging our ideas about the Universe. Scientific research is a continuous process and new discoveries are being made all the time, leading to new questions and new challenges to our current understanding of the Universe.
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why was shifting cultivation sustainable in the past
if the nucleotide or base sequence of the dna strand used as a template for messenger rna synthesis is acgtt, then what would be the sequence of bases in the corresponding mrna? if the nucleotide or base sequence of the dna strand used as a template for messenger rna synthesis is acgtt, then what would be the sequence of bases in the corresponding mrna? guacc tgcaa acgtt ugcaa
If the template strand of DNA has the base sequence as ACGTT, then the sequence observed in corresponding m-RNA will be: UGCAA.
DNA stands for Deoxyribonucleic Acid. It is the most abundant form of genetic material present in majority of the living organisms. The structure of DNA is a double stranded helical form where the strands are joined together due to hydrogen bonding between the bases.
m-RNA stands for messenger RNA. It is the form of RNA that contains the genetic information from the DNA, which is required for the synthesis of protein. The strand of m-RNA is complementary to the template DNA strand.
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What are the two types of species interactions?
Interactions that take place between members of the same species are referred to as inter-specific interactions, whereas intra-specific interactions happen between members of different species.
Inter-specific or intra-specific interactions in the environment can be distinguished. Interactions between members of the same species are known as intra-specific interactions, whilst those that take place between members of two or more species are known as inter-specific interactions. These relationships, however, can be influenced and modified by other species and their interactions because the majority of species live in ecological communities. These include rivalry, predation, herbivory, and symbiosis, which will all be covered in this article. Competition is most frequently thought of as the interaction of individuals who compete for a scarce shared resource, but it may also be defined more broadly as the direct or indirect contact of organisms that results in a change in fitness when the organisms share a resource.
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who demonstrated that dna is the genetic material of the t2 phage?
Hershey-Chase demonstrated that DNA is the genetic material of the t2 phage.
The Hershey-Pursue tests were a progression of examinations led in 1952 by Alfred Hershey and Martha Pursue that assisted with affirming that DNA is genetic material.
While DNA had been known to researcher since 1869,numerous researchers actually accepted at the time that proteins conveyed the data for legacy since DNA seemed, by all accounts, to be a dormant particle, and, since it is situated in the core, its job was viewed as phosphorus stockpiling. In their examinations, Hershey and Pursue showed that when bacteriophages, which are made out of DNA and protein, contaminate microorganisms, their DNA enters the host bacterial cell, however the greater part of their protein doesn't. Hershey and Pursue and resulting revelations generally demonstrated that DNA is the innate material.
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Fungi are multicellular decomposers that obtain nutrients by a. internal digestion b. extracellular digestion c. photosynthesis d. chemosynthesis
The correct option is b, that is extracellular digestion. Fungi are multicellular decomposers that obtain nutrients by extracellular digestion.
What are fungi ?Along with plants, mammals, protozoa, and monera, fungi make up the kingdom Fungi. Fungi are a form of eukaryotic life. The variety of fungi is astounding, and some of the most typical types include yeast, molds, truffles, and mushrooms.
Any member of the eukaryotic group of organisms, which also includes the more well-known mushrooms and microbes like yeast and mold, is referred to as a fungus.
How do fungi cause harm?Food spoilage, forest destruction, crop, livestock, and human disease are just a few of the negative effects caused by fungi. Many foods that are stored become spoiled by fungi, particularly molds like Penicillium and Aspergillus. The bulk of plant diseases are brought on by fungi, which in turn results in significant monetary losses.
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The interaction between bees and sunflowers is an example ofanswer choicespredationherbivoryparasitismmutualism
Answer:
example of mutualism
Explanation:
The interaction between bees and sunflowers is an example of mutualism. b/c mutualism is a type of ecological connection where both species gain from the interaction. In the case of sunflowers and bees, the flowers profit from the pollination services supplied by the bees, while the bees gain from the nectar provided by the blooms.
HELP ME PLSSSSS!!!
What are two differences between phototropism and gravitropism in plants?
Answer: The stimulus: Phototropism is the growth of a plant in response to light, whereas gravitropism is the growth of a plant in response to gravity.
The direction of growth: Phototropism causes a plant to grow towards a light source, while gravitropism causes a plant to orient its growth in response to the direction of gravity, typically roots grow downward while shoot grow upwards.
All of these are risks of renewable energy except
A. can disrupt migration patterns of birds
B. can cause flooding
C. can contaminate groundwater
D. can spill during transport and disrupt ecosystems
Answer:
D. can spill during transport and disrupt ecosystems
Explanation:
The correct option would be "D. can spill during transport and disrupt ecosystems" as it is not a risk of renewable energy sources, as renewable energy sources such as solar, wind, and hydroelectric power do not involve transport of fuels and do not have the risk of spills.
