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Dafna11 [192]
3 years ago
10

.) According to the video, how do they define a fossil?

Biology
1 answer:
Anna11 [10]3 years ago
7 0

Answer:

searching

Explanation:

is the best way to find and search for the fossil

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Two competing hypotheses to account for the increase in the number of Hox genes from the last common ancestor of bilaterians to
Tomtit [17]

Answer:

The duplication of a cluster of four Hox genes is equally likely as the duplication of a single Hox gene.

Explanation:

This comes from the definition of the parsimony principle, which is the action of choosing the simplest scientific explanation fitting the given evidence, meaning that all other elements are equal when evaluating the hypothesis. In biology the best hypothesis is the one that requires the fewest evolutionary changes.

Since three independent duplications of an individual Hox gene is in  evolutionary terms, more complex than a single duplication or a cluster, then that hypothesis would be the most parsimonious.

5 0
3 years ago
When the elodea is underwater where is the carbon dioxide coming from
astra-53 [7]
The elodea is getting the carbon dioxide from its environment like when underwater animals breathe out carbon dioxide the plants will use that carbon dioxide. The plants can also get the carbon dioxide from the atmosphere which can "dissolve" in water.
5 0
3 years ago
In the eastern region of the former Soviet Union, a railroad was built on the tundra. The surface soil was dug up and tracks wer
Dafna11 [192]
<span>When the surface layer was dug up, the permafrost was exposed. When the weather warmed, this exposed permafrost would have melted and become soggy, causing the ground underneath the tracks to shift.</span>
8 0
3 years ago
Which of the following is necessary for the light-independent reactions to proceed?
Yanka [14]

Answer;

C) ATP

Explanation;

-Photosynthesis can be divided into two parts: the light-dependent reactions and the light-independent reactions (also referred to as the "dark" reactions).

-The two products of the light-dependent reactions of photosystem are ATP and NADPH.  The movement of high energy electrons releases the free energy that is needed to produce these molecules.  The ATP and NADPH are used in the light-independent reactions to make sugar.

-The light-independent reactions, or dark reactions, of photosynthesis are chemical reactions that convert carbon dioxide and other compounds into glucose. These reactions occur in the stroma, the fluid-filled area of a chloroplast outside the thylakoid membranes.

8 0
3 years ago
When particles travel from an area of high concentration to low concentration, it's called ...
pishuonlain [190]
The action in which particles go from a high area of concentration to a lower concentration is called diffusion!








3 0
3 years ago
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