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Vera_Pavlovna [14]
2 years ago
13

Which statement is an example of variation within a species? picture attatched.

Biology
1 answer:
Alina [70]2 years ago
4 0

Answer: B

Explanation: The other answers are talking about similarities among different species.

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Some have speculated that the origin of life occurred at geothermal vents. amino acids can form there. compared to the amino aci
cluponka [151]

There are a number of amino acids that have formed under certain environmental conditions if the required elements are present and the energy conditions ar compatible with chemical assembly. These conditions have also allegedly formed amino acids on meteors, asteroids and comets.


But, amino acids are a very minor component of more complex biochemical assemblies required for life. Pentose sugars are also required, which form under different environmental conditions than amino acids. More importantly, only left-handed homochiral amino acids and right-handed homochiral sugars can form functioning biochemical assemblies that are viable in an organism. But, natural conditions, like hydrothermal vents only produce racemic versions of sugars and acids, meaning they are always approx. 50% left and right handed. This is fatal to forming viable biochemical assemblies.


Further, it is not possible for all of the 20+ homochiral amino acids needed for a living organism to form naturally. The only ones found have been the simpler amino acids. Also, the 4 critical nucleotide amino acids, C, G, A, T, do not form naturally, are not homochiral, nor in the right proportions.


The geo/hydrothermal vent conjecture is nonsensical. These are open systems, susceptible to currents, mineral contamination, salinity, ph, and temperature, making them a totally unacceptable environment for the precise and exact placement of elements to assemble to form life.

3 0
2 years ago
In animal cells, what are the holes between directly connected cells used for intercellular communication called? receptor chemi
Marianna [84]

Answer:

plasmodesmata

Explanation:

Plasmodesmata are channels between adjacent plant cells, while gap junctions are channels between adjacent animal cells. However, their structures are quite different. A tight junction is a watertight seal between two adjacent cells, while a desmosome acts like a spot weld.

8 0
2 years ago
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Plz plz plz help
Yuki888 [10]
Asexual reproduction = Binary Fission = Mitosis
The cell at the end of asexual reproduction compare to the original cell: at the end is called daughter cell, at beginning is parent cell; both have same number of chromosomes (2n = diploid).
3 0
3 years ago
How are mitosis and meiosis similar?
timofeeve [1]

Answer:

Explanation:

They both produce new cells

Explanation:

Mitosis and meiosis both represent cell division that occur in humans and other animals. These cell division processes share many aspects, including the production of new cells and replication of genetic material.

4 0
1 year ago
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Hemodialysis can only be performed in an inpatient setting. answer true false
Yakvenalex [24]
The correct answer of the given health question above would be TRUE. It is true that hemodialysis can only be <span>performed in an inpatient setting. Hemodialysis is a therapy that uses a machine or dialyzer in order to filter or remove wastes from the blood such as urea. It can only be done either in a hospital or a dialysis center. Hope this answer helps.</span>
8 0
2 years ago
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