Answer:
I'm gonna need the examples to answer this!
Explanation:
i think it is A frog releases sperm over eggs that were laid by another frog, and these cells fuse together. and A pollen grain from one flower fertilizes another flower, resulting in the development of a seed.
Water is a polar molecule because?
A. It has a charge
B. It does not have a charge
C. Contains two hydrogen atoms for each oxygen atom
D. Different parts of the molecule have slightly different charged
Answer:
D. Different parts of the molecule have slightly different charges
Explanation:
Water is a polar molecule because different areas of the molecule have different and opposite charges
Oxygen has a higher electronegativity than hydrogen, which means the electrons of the water molecule will stay closer to the oxygen than the hydrogen.
This creates an uneven distribution where the oxygen has a partial negative charge and the hydrogen has a partial positive charge.
So, D is the correct answer.
Which of the following are examples of active transport that cells use to maintain homeostasis? (mark all that apply)
Pinocytosis and phagocytosis are examples of active transport that cells use to maintain homeostasis, hence option A and C are correct.
What is homeostasis?The propensity to oppose change in order to preserve a stable, largely constant internal environment is known as homeostasis. Negative feedback loops are frequently used in homeostasis to combat deviations from set positions in a variety of properties.
Moving uphill is considered active transportation. A cell must expend energy to transport materials against a concentration or electrochemical gradient.
This is precisely what active transport systems do they use energy, frequently in the form of ATP, to keep the proper concentrations of ions and molecules in living cells.
Therefore, option A and C are correct.
Learn more about homeostasis, here:
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DESCRIBE how the defect in the Single-Mutant (Sev−) R7 precursor cell causes the cell to become a cone cell instead of a photoreceptor cell
Answer and Explanation:
Cells directed their growth by getting the signals from distant or local bases and respond by directing signals. Each signal changes the cell state and decides how cells reply to consequent signals. RTK (receptor tyrosine kinase) signaling is needed for the arrangement of the R1-R7 photoreceptors. It activates the phyllopod transcription through the Ras/MAPK pathway. The Phyllopod transcription codes an adapter protein that guides the ubiquitin ligase Sina to target the transcription factor named Ttk (tram track) for deprivation. Tram track (Ttk) is the main inhibitor of the development of photoreceptors. The cells that do not damage Ttk become the ommatidium components, while those cells that damage it continues to develop photoreceptors. Receptor tyrosine kinase signaling is also involved in the development of ommatidium. Receptor tyrosine kinase signaling controls the propagation and existence of cells before they are employed in the cluster. RTK also regulates the differentiation of cone cells. Whether a cell becomes a photoreceptor or not is also decided by RTK signaling events.
4.
Which type of population would be best suited for adapting to an environment that
undergoes a sudden change in climate?
a. A population with a higher numbers of males than females
b. A population with many phenotypes (physical characteristics)
C. A population with a high rate of emigration
d. A population with individuals that all express dominant traits.
What is the medullary index for an organism that has a medulla width of 2cm and hair shaft width 4cm? Is this organism human or animal?
Answer:
a. 1/2 b. The organism is an animal
Explanation:
a. What is the medullary index for an organism that has a medulla width of 2cm and hair shaft width 4cm?
Medullary index = diameter of medulla/diameter of hair.
Given that diameter of medulla = medulla width = 2cm and diameter of hair = hair shaft width = 4cm,
Medullary index = diameter of medulla/diameter of hair = 2 cm/4cm = 1/2
b. Is this organism human or animal?
Since the medullary index = 1/2 > 1/3 (if it is ≤ 1/3 it is human hair and ≥ 1/2 it is animal hair), it is animal hair. So, the organism is an animal.
Sphere interactions are driven by two sources of energy. The EXTERNAL source of energy comes from what?
Answer:
From the Sun
Explanation:
Solar power is energy turned by the sun into thermal or electricity. The cleanest and most generous source of usable green energy is solar energy.
Solar energy, Solar radiation capable of heat creation, chemical reactions or power generation. The cumulative number of solar energy events on earth significantly exceeds existing and planned energy needs worldwide.
What is the shape of the eye? oval circle sphere dodecahedron
Which category of biological molecule includes DNA?
1. carbohydrate
2. nucleic acid
3. protein
4. lipid
Answer: DNA is a nucleic acid
Explanation:
The acronym DNA stands for deoxyribonucleic acid.
How does your radio tuner select for different FM radio stations
Modern radio tuners use a superheterodyne receiver with tuning selected by adjustment of the frequency of a local oscillator. This system shifts the radio frequency of interest to a fixed frequency so that it can be tuned with fixed-frequency band-pass filter
Which two genes are most likely to be affected by a crossing over event?
A. a pair of genes located adjacent to another on a chromosome
B. a pair of genes separated by a third gene on a chromosome
C. a pair of genes located at opposite ends of a chromosome
D. a pair of genes located on different chromosomes
Answer:
C
Explanation:
i just took this test
a yellow light in a blue light shine together on a white screen what color will the screen be.
Answer:
Green
Explanation:
What does the circulatory system do for your body?
Answer:
The circulatory system, also known as the cardiovascular system, is a simple loop which starts, and ends, with your heart. It is a closed system, meaning blood does not enter or leave the system during its journey from your heart to your body and back again.
Explanation:
Rabbits can have different types of ears. Tall ears stand up and floppy ears drag the
ground. Assume that the ear type is determined by a single gene and that the allele for tall
ears is dominant over the allele for floppy ears. In a cross between two rabbits with floppy
ears, what percentage of the offspring would be expected to have tall ears.
100%
O 50%
2596
096
Answer:
Explanation: 0% because neither of the rabbits have the dominant gene for tall ears. We know that neither of them have the dominant gene for tall ears because
The parents both have floppy ears
Please HELP PLEASE ITS A BIG GRADE
Answer:
I believe the third one I'm not sure if I'm right
After an earthquake, a small group of beetles from a much larger population becomes trapped in a cave. They are able to persist (continue living and reproducing) in the cave, but they cannot migrate back to the source population outside the cave. What would most likely result from this scenario
Answer:
They will evolve into a new species
Explanation:
The most likely result from this scenario is that the now isolated group of beetles will evolve and become a new beetle species that is unique from the old population.
The beetles have become geographically isolated from the original population and this makes them become a new species through the process of allopatric speciation. Allopatric speciation is an evolutionary mechanism of species formation as a result of being geographically separated from the old population. It is as opposed to sympatric speciation in which a new species is formed within a population of species without being geographically barred from the original population.
The fact that the isolated species are now in an environment that is different from that of the original population means that they will take a different route to evolve in terms of trying to adapt to the changes that would be occurring in their environment.
please help Most ovens we use at home are powered by electricity or natural gas. These ovens use fossil fuels. Describe why the
energy used by a solar oven is considered a clean source of energy.
Answer:
Explanation:
Clean energy are renewable energy. This are energy from natural sources that are renewed without extra cost. Sun, wind, water are examples of renewable natural resources that helps generate clean energy.
The energy are refer to as clean because, they do not lead to any deposit of gasses that can affect the environment leading to environmental pollution. They have little or no side effects, no combustions or release of gases that are toxic or can deplete the environment as in the case of non- renewable energy.
The diagram below shows the branching tree diagram for cats.
A slanting, horizontal line is shown. On the extreme left, there is a label that says Common Ancestor. Along the slanting, horizontal line there are five dots labeled from left to right with the following traits Four limbs, Amniotic egg, Fur, Shearing teeth, and Retractable claws. There is one vertical line between each of the consecutive five dots. The lines are labeled from the from left to right as Amphibians, Reptiles, Marsupials, Dogs, Cats.
Which shared derived characteristic do reptiles, marsupials, and dogs have?
Amniotic egg
Fur
Retractable claws
Shearing teeth
Answer:
I am pretty sure it is shearing teeth
Explanation:
Answer:
shearing teeth
Explanation:
toxic substances may: *
Answer:
pollute our oceans and air?
Answer:
Burn is the answer
Explanation:
This sidewalk has changed over time.
A. Identify what caused the sidewalk to change and what the process causing the
change is called?
Answer:
expansion
The process where by things expand when they come in contact with heat
5. Explain how the interconnectedness of living and nonliving things is shown in the
biogeochemical cycles. Answer in five to 10 sentences, giving specific examples
from at least two of the cycles.
Answer:
Biogeochemical cycles are the various cycles that essential for the living organism. In these cycles, elements or compounds are moved between living and nonliving organisms. These cycles are interconnected to support life and move the energy and molecules into the loop. Examples of such biogeochemical cycles are the water cycle, carbon cycle oxygen cycle, and many others.
Carbon is an element that is important and moves in different spheres of earth including the atmosphere, geosphere, and biosphere. Similarly, water is a compound essential for living organisms and moves from the hydrosphere to living organisms and the atmosphere.
Although all of the cells of a human develop from one fertilized egg, the human is born with many
different types of cells. Which statement best explains this observation?
a. Developing cells may express different parts of their identical genetic instructions.
b. Mutations occur during development as a result of envirnmental conditions.
C. All cells have different genetic material.
d. Some cells develop before other cells.
Answer:
a. Developing cells may express different parts of their identical genetic instructions.
Explanation:
Humans are multicellular organisms i.e. we possess many cells in our body. These cells increase as a result of division. Although all of the cells of humans develop from one fertilized egg (zygote), the human is born with many different types of cells because of a process called CELL DIFFERENTIATION.
Cell differentiation is a process in multicellular organisms where a cell becomes more specialized in function as it divides. The set of genes contained in each cell are not expressed simultaneously i.e. some genes are expressed while others are repressed. This is how cells with the same gene possess different functions. Therefore, according to this question, developing cells may express different parts of their identical genetic instructions to be of different types.
What is the sexual reproduction process of angiosperms?
Answer:fertilization
Explanation:
Answer: Sexual reproduction occurs in three stages: pollination, fertilization, and dispersal. During pollination, pollen is transferred from the anther to the stigma. Once the pollen is stuck to the stigma, it produces a pollen tube that grows down the style to the ovary and into the ovule. A sperm cell then travels down the pollen tube into the ovule and fertilizes the egg cell. The fertilized egg is called a zygote. This zygote grows into a plant embryo. The embryo is located inside the seed along with the seed coat and stored food. The ovule develops into the seed. The ovary develops into the fruit that protects the seed. The fruit also helps disperse the seed. Seeds are dispersed, or spread, to new locations, where they grow into seedlings. or pollen is taken to the stigma. i took the test
What causes sickel cell anemia
Answer:
Sickle cell anemia is caused by a mutation in the gene that tells your body to make the iron-rich compound that makes blood red and enables red blood cells to carry oxygen from your lungs throughout your body (hemoglobin)
Explanation:
Answer:
Sickle cell anemia is caused by a mutation in the gene that tells your body to make the iron-rich compound that makes blood red and enables red blood cells to carry oxygen from your lungs throughout your body
Explanation:
what would happen to exposed flesh in the higher levels of the atmosphere?
What is the connection between the structure of DNA and the structure of a protein?
Explain using dystrophin as an example.
Explanation:
The sequence of basis on the DNA molecule is what directs the sequence of amino acids in the protein molecule - that's how it all links together! So, the sequence of bases in DNA codes for the sequence of amino acids of a protein.
According to the table what is the optimum temperature for the production of glucose in plants
Answer: I’m pretty sure it’s 30 degrees Celsius or 86 degrees Fahrenheit
a certain stem cell produces only muscle
Answer:
unipotent stem cell
Explanation:
The depolarization of the ____________ normally generates the action potential that leads to depolarization of all other cardiac muscle cells.
Answer:
The depolarization of the ___SOMA NEURONAL_________ normally generates the action potential that leads to the depolarization of all other cells of the heart muscle.
Explanation:
The depolarization of the neuronal body, that is, the body of the neuron, generates an action potential that is transported throughout the axon, until in the motor unit (union between neuron and muscle) the action potential is transmitted to the cardiac cell, depolarizing the membrane of the myocardial cell and thus effecting cardiac contraction.
Cardiac contraction occurs in a controlled, rhythmic and systematic manner, with autonomic character and as a consequence of the release of calcium from REL to LIC
Which codon is the code for the amino acid serine (Ser)?
A. AGA
B.AGU
C.AGG
D.UGA
How much of Earth is covered in water?
A. 95%
B. 75%
C. 25%
D. 50%
9 MBO
