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Nat2105 [25]
3 years ago
15

Which of the following will occasionally produce a duplicate gene?

Biology
2 answers:
lbvjy [14]3 years ago
8 0

b/<span>Crossing-over during meiosis</span>
In-s [12.5K]3 years ago
4 0
<span>Homologous chromosomes exchange DNA during meiosis in a process called crossing-over. Crossing-over sometimes involves an unequal swapping of DNA. Basically one chromosome in the pair gets extra DNA.</span>
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For patients who have familial hypercholesterolemia, what should be the focus of teaching for blood cholesterol reduction
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3 years ago
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R-organisms reproduce at a very high rate. Knowing this, why don’t they usually reach their carrying capacity? a. They live in e
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Answer:

D: a and b only

Explanation:

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Scientists originally thought cell membranes evolved before RNA. However, recent evidence suggests RNA developed before the memb
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Answer:

The need for replication, specialization, compartmentalization is key to understand that RNA evolved first

Explanation:

Logical contrast considering a certain catalytic activities of cardinal importance in the early evolution of life ;

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• the ribozyme activity in this process must have engaged an in vitro process in a body part that no longer has a function such that it that can only synthesize moderate lengths of RNA

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• when it acts on copies of other type of RNA molecules in its surrounding he can promote their replication

• a cooperative system might have evolved from the neighbors to help the survival of this friendly RNA molecules – through catalytic actions, such that a set of different types of RNA molecules evolves with a mark of specialization for different activity.

The development of individual compartments is proposed to be akin to the effective self-replicating systems.

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• If these RNAs were free to diffuse among a large population of other RNA molecules, they could be assimilated into an established group by other replicating systems, which in turn may compete with the original RNA system for raw materials.

• The quality of the self-replicating systems they generated relies on the compartment that restricts the RNA molecules only to the system they serve.

• compartments started simply and perhaps had simple adsorption on surfaces or simple particles.

• compartmentalization became complex requiring a class of small molecules with varying physicochemical properties liike being amphipathic.

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Lemur [1.5K]

Explanation:

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