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Anna71 [15]
3 years ago
10

Explain the concept of natural selection.

Biology
1 answer:
umka21 [38]3 years ago
6 0

Answer:

the process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin and is now believed to be the main process that brings about evolution.

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Describe the benefits to using tissue cultures to study medications used for treating cancer cells
liberstina [14]

Medications can be tested on cell cultures instead of being injected into patients unnecessarily.

Cancer cells continue to grow in the cultures uncontrollably allowing scientists to test multiple medications on the cancer cells.

7 0
3 years ago
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Somatic motor neurons are used to transmit motor signals to muscles. For example, a somatic motor neuron carries a signal from y
Andru [333]

Answer:

Dendrites, cell body, axon hillock, axon, synaptic terminals, biceps brachii.

Explanation:

Neurons are the structural and functional unit of the nervous system. The neurons helps in the transmission of nerve impulse in the body. Two main types of neuron are somatic neuron and motor neuron.

The signal is first reach to dendrites. From the dendrites, the signal transmit to the cell body and then to the axon hillock. The signal then transmits to the axon. At the end of neuron the message is transmitted to the synaptic terminal. The nerve impulse finally reaches to the biceps brachii and results in the flexion of the arm at the elbow.

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3 years ago
Which prossess is defined as breaking down rocks into smaller pieces without changing the rocks' compositions
soldier1979 [14.2K]

mechanical weathering

Mechanical weathering is the process of breaking big rocks into little ones. This process usually happens near the surface of the planet. Temperature also affects the land. The cool nights and hot days always cause things to expand and contract. That movement can cause rocks to crack and break apart.Mechanical weathering involves mechanical processes that break up a rock: for example, ice freezing and expanding in cracks in the rock.

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3 years ago
What is DNA??????????
Dafna1 [17]

Answer:

DNA, short for deoxyribonucleic acid, is the molecule that contains the genetic code of organisms. This includes animals, plants, protists, archaea and bacteria. DNA is in each cell in the organism and tells cells what proteins to make. ... DNA is inherited by children from their parents.

Explanation:

5 0
2 years ago
1. True or False: Transcription takes place in the cytoplasm.
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#1 question the answer is False
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