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SVETLANKA909090 [29]
3 years ago
13

The hypothesis that all species are descended from common ancestors was proposed by

Biology
1 answer:
MrRissso [65]3 years ago
6 0
The answer is Charles Darwin. He was the first to theorize evolution from a common ancestor.
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How does mutation enable viruses to continue causing disease?
Hunter-Best [27]
Genetic Change in Viruses. Viruses are continuously changing as a result of genetic selection. They undergo subtle genetic changes through mutation and major genetic changes through recombination. Mutation occurs when an error is incorporated in the viral genome
3 0
3 years ago
Define bi sexual reproduction
tigry1 [53]

possessing characters of both sexes and especially both male and female reproductive structures


hope this helps.

4 0
3 years ago
Region A has a low solute concentration. Region B has a high solute concentration. They are separated by a selectively permeable
8_murik_8 [283]

Answer: osmosis

Explanation: osmosis is the movement of the water molecules from a region of high concentration of solute to a region of low concentration of solute, through a semi-permeable membrane.

This movement occurs until the concentration on both sides is on equilibrium.

Semi permeable membrane allows the movement of water only but not the solute.

In this case,water moves from region A to region B.

5 0
3 years ago
A 53-year old woman collapses while gardening. she is unresponsive, is not breathing, and does not have a pulse. a neighbor, who
patriot [66]

The next step would be to follow the AED prompts.

An AED or Automated External Defibrillator refers to a lightweight, small apparatus, which evaluates an individual's heart rhythm and can determine the irregular heart rhythms, like VF (ventricular fibrillation) or VT (ventricular tachycardia), also called Sudden Cardiac Arrest.

Automated external defibrillators can assist in saving many lives at the time of sudden cardiac arrest. However, even after training, memorizing the steps to use an AED in the right manner can be tough.


8 0
3 years ago
Read 2 more answers
Fish lay a large number of eggs, few of which are fertilized and very few of which hatch into young ones. Still fewer live to ma
vazorg [7]
The answer would be survival of the fittest.

This metaphor, "<em>survival of the fittest</em>," was used by Herbert Spencer to explain <em>natural selection. </em>It is sometimes also referred to as the survival for existence. This phrase came from the Dawinian theory of evolution where he explains that all species are capable of producing many offsprings. However, the survival of those offsprings depends on their ability to adapt to the risks and opportunities of the external environment. 
<em>
</em>This relates to your scenario in the sense that fish lay a lot of eggs in the beginning but not all of them would live to achieve maturity. This is because even as eggs, they have many predators and are exposed to other elements. The threat pushes on even if they are able to hatch and grow up. 
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8 0
3 years ago
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