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olga_2 [115]
3 years ago
9

Oxygen is moved around the body of an echinoderm in its

Biology
1 answer:
MAXImum [283]3 years ago
4 0

Answer:

Oxygen is moved around the body of an echinoderm in its C. water vascular system.

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Which of the following are true of a species? Select all that apply.
tatiyna

Answer:

the 1rst and 2nd

Explanation:

all fertile individuals can breed with one another and individuals vary genetically

8 0
2 years ago
According to Figure 2–6, which enzyme would you expect to find in a bacterium growing in a hot spring?
Mekhanik [1.2K]
Answer: Enzyme Y! Hope this helps :)
5 0
3 years ago
Select all that apply.<br> Atoms are made up of
vekshin1

Answer:

protons, neutrons, and electrons.

5 0
3 years ago
Read 2 more answers
The Earth contains a great diversity of species. This:
True [87]

Answer:

The correct option is A) will make no difference in the survival of life if there were major changes in the environment.

Explanation:

Due to genetic diversity, variations in species are caused which makes some organisms of a species to be better adapted than other members of the species. These variations cause organisms to survive when differences in the environment occur. Although the allele frequencies might change due to the changes in the environment but the phenomenon of genetic diversity allows life to sustain on earth even when conditions will become unfavourable.  

8 0
3 years ago
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
3 years ago
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