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Paraphin [41]
3 years ago
15

(10 points) One of the accepted scientific theories describing the origin of life on Earth is known as chemical evolution. Accor

ding to this theory, which of the following events would need to occur first for life to evolve?

Biology
1 answer:
vodomira [7]3 years ago
8 0

Answer:

Synthesis of organic molecules

Explanation:

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Where does the energy that powers the water cycle come from?
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4 0
3 years ago
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Increases and decreases of the heart rate result from changes in the activity of the _______. A. medulla oblongata B. thalamus C
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Option A. Increases and decreases of the heart rate result from changes in the activity of the <u>medulla oblongata</u>

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What is medulla oblongata ?

  • Medulla oblongata, also called medulla, the lowest part of the brain and the lowest portion of the brainstem.
  • The medulla oblongata is connected by the pons to the midbrain and is continuous posteriorly with the spinal cord, with which it merges at the opening (foramen magnum) at the base of the skull.
  • The medulla oblongata plays a critical role in transmitting signals between the spinal cord and the higher parts of the brain and in controlling autonomic activities, such as heartbeat and respiration
  • The medulla is divided into two main parts: the ventral medulla (the frontal portion) and the dorsal medulla (the rear portion; also known as the tegmentum).
  • The ventral medulla contains a pair of triangular structures called pyramids, within which lie the pyramidal tracts.
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To know more about medulla oblongata, refer:

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7 0
2 years ago
2. In polar regions, phytoplankton.
natka813 [3]

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b. thrive during the summer, when sunlight increases

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Phytoplankton production is highly associated with latitude and season. In polar regions, phytoplankton production is reduced to the summer (and eventually spring) season. In consequence, the zooplankton that eats phytoplankton only can survive during the spring and summer seasons. On the other hand, in tropical areas, there exists a nearly constant phytoplankton production all year round.  

6 0
3 years ago
A man with Type A blood has a child with a woman with Type B blood. The child is Type O. What are the genotypes of the parents?
steposvetlana [31]
It would be AO and BO this would be the only one with a change of Type O blood the others do not have any chance
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