Answer:
allopatric speciation.
1. compare and contrast channel proteins and the classes of carrier proteins (e. g. , uniporter, symporter, and antiporter) including the relative direction of molecule movement and any associated energetic needs. which protein class would nicotinic acetylcholine receptors (nachrs) be associated with?
2. in cardiac muscle, acetylcholine binds to muscarinic acetylcholine receptors (machrs), which are g-protein coupled receptors, which elicit a signal transduction pathway that induces cardiac muscle to relax. outline how g-protein coupled receptors induce signal transduction pathways including relevant secondary messengers.
3. interpret dr. peterson’s statement that active transport is essential for facilitated diffusion of na+ ions to occur in muscle cells. how are na+/k+ pumps involved in this process? sketch a na+/k+ pump indicating conformational changes and energy usage steps and identify ions that are moved during the cyclic process.
4. generally, after neurotransmitters are released in the neuromuscular junction, many of the neurotransmitters or some of their components are recycled by a reuptake mechanism inherent in the pre-synaptic neuron. considering that the reuptake mechanism is often a sodium-dependent process that utilizes membrane potential, what type of membrane transport might you expect to be in play here?
Uniporter allows the movement of a subtance in one direction, symporter two molecules in the same sense and antiporter two in opposite sense. Nicotinic acetylcholine receptors are linked to symporters to allow the movement of neurotransmitters. G protein function is coupled to second messengers such as cyclic AMP, active transport allows the movement of substance again a concentration gradient and reuptake mechanism involves symporter transport.
What are uniporter, symporter, and antiporter?The terms uniporter, symporter, and antiporter make reference to different types of channel proteins located in the cell membrane which allows the movement of molecules through this selectively permeable barrier.
Moreover, nicotinic acetylcholine receptors are receptors that bind to certain neurotransmitter chemical messengers such as acetylcholine in order to allow the movement of ions through the membrane.
Therefore, with this data, we can see that uniporter, symporter, and antiporter are different classes of channel proteins in regard to the movement of molecules in and out of a selectively permeable barrier (i.e. the cell membrane).
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Work is equal to the force of a push or a pull multiplied by the ___ the object moved
Work is equal to the force of a push or a pull multiplied by the distance the object moved
Answer:
Distance moved by the object
Explanation:
what would happen to the sea star or the seaweed if the algae were not present
Answer:
Star fish (sea stars) prey on mussels and if the sea stars are removed from the environment, the mussel population will greatly increase and other organisms may have difficulty living in that environment.
Starfish are known as keystone predators. They prey upon species like urchins or mussels that can have a negative impact on the ecosystem if their populations grow too much. However, if the Starfish don't prey upon urchins and mussels those population could grow and take over the ecosystem and create many problems for other species.
Explanation:
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What is one difference between renewable and nonrenewable resources?
Provide one example of a renewable energy source, and one example of a nonrenewable energy source.
Use these sentence starters to help you:
One difference between renewable and nonrenewable energy sources is _______________.
One example of a renewable energy source is ___________.
Answer:
Explanation:
1. a renewable resource can be repeatedly and replace naturally. but a non renewable resource cannot be repeatedly and replaced shortly.
2. Renewable Resources Nonrenewable resources
--> Solar Energy --> Oil
3. One example of a renewable energy source is _solar energy_
Answer:
One difference between renewable and nonrenewable energy sources is that renewable sources of energy can be renewed naturally overtime while nonrenewable sources of energy are not replaceable and have a limited quantity.
One example of a renewable energy source solar energy.
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What are the three distinct characteristics of fish?
Answer:
All fish are cold-blooded, which is also called ectothermic.
Water Habitat. Another shared characteristic amongst all fish is that they live in water.
Gills to Breathe.
Swim Bladders. .
Explanation:
Scientists have observed that in the Antarctic ecosystem Adélie and Chinstrap penguin populations have decreased in the past 40 years by about half. However, Gentoo penguin populations have remained steady and are possibly increasing. Increasing ocean temperatures in the Antarctic is resulting in less sea ice and less krill because krill depend on sea ice.
Which statement, if true, BEST explains why Gentoo penguins have a survival advantage in the changing Antarctic environment?
A.
Adult Gentoo penguins average about 0.5 kilograms more in weight than adult Adélie and Chinstrap penguins.
B.
Leopard seals prey heavily upon juvenile penguins.
C.
Gentoo penguins eat more types of prey than either Adélie or Chinstrap penguins.
D.
Penguins spend a large amount of their energy on keeping warm during harsh winters with very low temperatures.
Answer:
C.
Gentoo penguins eat more types of prey than either Adélie or Chinstrap penguins.
Explanation: It makes the most sense over the other ones.
EASYYYYYYYY
AS THE CELL GETS SMALLER, WHAT HAPPENS TO THE SURFACE AREA TO VOLUME RATIO
please can someone help asap?! so stressed with bio right now):
The answer is D) fruits and vegetables that do not spoil easily
You can eliminate B and C, since those two are clearly not positive outcomes (I doubt anybody would want more viruses and fewer animals on Earth!)
A is a little less obvious; however, genetically manipulating crops to have a slower growth rate would be a negative effect on the harvest (and it's probably something most farmers wouldn't want to do anyway.)
So, the answer is D. This makes sense, since having fruits and veggies that don't spoil easily would be a benefit so they can have longer shelf lives.
Hope this helps :)
Use the resources provided to either describe in words OR create a model that describes at least 4 reasonable factors that might influence the carrying capacity of Nubian ibex in Israel.
Poaching, division of populations, loss of habitat and water availability affects the carrying capacity of Nubian ibex.
Factors affecting carrying capacityPoaching, division of populations, loss of habitat and water availability are the factors that greatly influence the carrying capacity of Nubian ibex at a particular region because these factors are the requirement of this organism for its survival.
So we can conclude that Poaching, division of populations, loss of habitat and water availability affects the carrying capacity of Nubian ibex.
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1. A small snake is found eating a cricket in a
grassland which level of succession would this be.
Explain your answer.
The level of succession which involves a small snake is found eating a cricket in a grassland is a Secondary succession.
What is Secondary succession?This is the type of succession which involves an area previously occupied by living things is disturbed or disrupted.
The grassland area has been occupied with living things already which makes it a secondary succession.
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If you could have any career in ecology, what would it be and why? Provide 4-5 complete sentences explaining your answer
ecology careers-
educator
habitat planner
zookeeper
land planner
technical assistant
natural resource manager
Answer:
I would say habitat planner and land planner
Explanation:
I picked habitat planner and land planner to do because I am an artist and a designer and I know how to put things together properly and for people to be like "Wow this is a beautiful piece right here" I would make it beautiful for the person's eyes when doing this you need to think about how a person might look at it I would want them to gasp and stare astonished and amazing and I could do that I've been practicing design for awhile now so If I were to pick these two things it is what I would do and also I really like nature and designing things with nature that others haven't thought about because it shows my creativity and ability to look beyond the point of just seeing.
If I could choose any career in ecology, I would pursue a career as a habitat planner.
Who is a habitat planner?This profession would allow me to contribute to the conservation and restoration of natural habitats, ensuring the well-being of various species and ecosystems. As a habitat planner, I would have the opportunity to assess existing habitats, develop conservation strategies, and collaborate with stakeholders to implement effective management plans.
I am passionate about the preservation of biodiversity and creating sustainable environments, and this career would allow me to make a tangible impact on the natural world. Additionally, working as a habitat planner would provide a dynamic and interdisciplinary work environment, where I could apply my knowledge of ecology, land management, and environmental policy to address complex conservation challenges.
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Can someone help me please :)
Answer:
yes
Explanation:
RNA can because the one that has more checks is the correct one
what features do paramecia and salamanders share?
Answer: Earthworms and gorillas.
Explanation:
Paramecia and salamanders. Ask the students to list as many features as they can think of that their two organisms have in common.
A scientist is studying the age structure of a small country, which is shown in the following diagram.
This graph charts the ages of the population of Nger of both men and women. There are much more young people than old people across both genders.
Which conclusion does the diagram most strongly support?
A. The population of the country is increasing at a rapid rate.
B. The population of the country is relatively stable, and neither increasing nor decreasing significantly.
C. In 50 years, about 20 percent of the population will be ages 0 to 4.
D. In 50 years, about 20 percent of the population will be ages 50 to 54.
Answer:
A :The population of the country is increasing at a rapid rate.
Explanation:
trust :)
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Which protein is used to reinforce the sarcolemma and help transmit the tension generated by the sarcomeres to the tendons?.
Answer:
dystrophin
Explanation:
Dystrophin is the protein used to reinforce the sarcolemma and help transmit the tension generated by the sarcomeres to tendons.
What is Sarcolemma?The sarcolemma, which is the muscle cell's plasma membrane, is encircled by endomysial connective tissue and a basement membrane. The sarcolemma is a membrane that is excitable and has several characteristics in common with the membrane of neuronal cells. The sarcotubular system, which extends into the interior of the muscle fiber as T-tubules, is an invagination of the sarcolemma. Through this system, the sarcolemma's depolarization spreads throughout the muscle fiber's interior. The sarcoplasmic reticulum, a second tubular structure within the sarcoplasm, is directly in contact with the T tubules as they extend into the interior of the muscle fibers towards the junction of the A and I bands. A "triad" is a tight arrangement of one T-tubule that is bound by the sarcoplasmic reticulum on both sides. Around the myofibrils, the sarcoplasmic reticulum forms a fine plexus. Ca2+ is released from the sarcoplasmic reticulum and the myofilaments begin to contract as a result of stimulation of the sarcolemma and T tubules.To learn more about sarcolemma, refer to
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what does the circle of life mean
Answer: Below
Explanation:
Generally the circle of life refers to the circle of birth, survival, and death.
Forensic scientists can use which of the following to test for the presence of drugs in a human?
Blood
Hair
Saliva
All of the above
Answer:
All of the above
Explanation:
The analytical approach in forensic chemical analysis of an unknown substance is to narrow down the possibilities until a drug is identified. After visual examination, presumptive or screening tests are conducted.
Forensic scientists are the category of scientists dealing with the test and test sampling. Drugs are mostly flown in the blood . The correct answer is all of the above.
What are the types of drugs ?
Drugs can be both narcotics and non- narcotics. There are the different categories that affect the central nervous system.
Drugs mostly flow in blood because of ions and molecules that get mixed with the blood.
Drugs mostly are prone to be mixed with the blood and these have easy and fast affect on the human body which makes us sometimes bear the mechanism of body reactions.
There are strong reactions that are complex that takes place in the body that makes us habitual sometimes.
Therefore, Forensic scientists can use blood as the most acceptable along with exceptions to other three options as well of the following to test for the presence of drugs in a human.
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If your small intestine where unwound approximately how long would it be.
It would be about twenty - two- ish feet
Which is not a major insect body segment?
Answer:
The answer is; LEG
Explanation:
hope this helps.
Which two phases of meiosis are most likely to cause chromosomal disorders?
Answer:
Nondisjunction can occur during anaphase of mitosis, meiosis I, or meiosis II. During anaphase, sister chromatids, will separate and move to opposite poles of the cell, pulled by microtubules.
Explanation:
Which of the following is shown by this gel?
OA.
The size of various molecules or fragments of DNA.
ОВ.
The size of each individual DNA base.
OC.
The number of strands of DNA in a molecule.
OD.
The sequence of nucleotides in a molecule.
do transported soil have different types of grain particles?
Answer:
Probably Yes
Explanation:
It's being moved so the other particles are most likely being lost so i would say, yes
The exchange of genetic material between nonsister chromatids is called crossing-over and occurs during which phase of meiosis?.
Answer:
prophase I
Explanation:
during prophase I, and it is the exchange of genetic material between non-sister chromatids of homologous chromosomes
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In this illustration, the rings around the Sun represent
A)
orbits.
B)
sun rays.
C)
radiation.
D)
dust particles.
Answer:
I think the answer is C. radiation
Explanation:
Radiation is around the rings and makes some type of weather.
The lipid layer that forms the foundation of cell membranes is primarily composed of molecules called __________.
Answer:
phospholipid bilayer
Explanation:
The cell membrane is composed mainly of phospholipids, which consist of fatty acids and alcohol. The phospholipids in the cell membrane are arranged in two layers, called a phospholipid bilayer.
a short note on plant cells and animal cells
Answer:
Nucleus, cell membrane, cytoplasm and mitochondria are four cell components that are found in both animal and plant cells.Explanation:
ASAP
15. If out of 100 offspring, 74 are purple flowered and 26 are white, what were the likely genotypes and
phenotypes of the parents if this is a simple monohybrid cross?
Answer:
so it would be a 3 : 1 ratio.
Explanation:
The probable genotypes of the parents is Pp (Purple). When we will cross the two heterozygous purple flowers we will get the purple and white coloured flowers
The ratio would be 3:1. The parents' likely genotypes are Pp (Purple). Purple and white colored flowers will result by crossing two heterozygous purple blooms.
What are Genotypes and Phenotypes?The type of variant existing 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 might be employed to denote a certain gene variant.
The term "phenotype" refers to an organism's observable qualities, which are a multifactorial result of hereditary attributes and environmental factors. The physical, biochemical, physiological, and behavioral characteristics of an organism make up its phenotype.
Pp is the likely genotype of the parents (Purple). In the example presented above, combining two heterozygous purple blossoms will produce flowers that are both purple and white.
Thus, the ratio would be 3:1. The parents' likely genotypes are Pp (Purple). Purple and white colored flowers will result by crossing two heterozygous purple blooms.
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Please help as soon as possible
PLEASE HELP WILL GIVE BRAINLIEST!!!!
Answer:
No, because in mammals the male transfers his genes by fertilizing the female directly. In plants, there even could be, the plant fertilizing itself, but the pollen is transferred differently than the mammal.
