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spin [16.1K]
3 years ago
10

Explain why the structure of DNA is described as a double helix

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

Answer:

The double helix is the description of the structure of a DNA molecule. A DNA molecule consists of two strands that wind around each other like a spiral staircase. Each chain has a backbone in which a sugar (deoxyribose) and a phosphate group alternate.

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What Kingdom do euglena belong to? What Phylum?
-Dominant- [34]

Answer:

Euglena are classified into the Kingdom Protista, and the Phylum Euglenophyta.

Explanation:

6 0
4 years ago
in a population of lizards , only the lizards with the longest tails survive and reproduce, what type of selection is described?
guajiro [1.7K]

Answer:

in a population of lizards , only the lizards with the longest tails survive and reproduce, what type of selection is described?

This is a natural selection as it entails the fittest lizards survives by passing the gene of its survival to its offspring hereby enables it not go into extinct

Explanation:

3 0
3 years ago
What is the most common inhibitory neurotransmitter in the brain?.
kherson [118]

Answer:

GABA or gamma-aminobutyric acid is the most important of the inhibitory neurotransmitters in the nervous system. It is the most abundant of them, and it is distributed throughout the brain and spinal cord.

Explanation:

3 0
3 years ago
Which of these is an abiotic factor in a rainforest ecosystem?
Degger [83]
I'd say precipitation, it won't be alive though so biodiversity is wrong
7 0
3 years ago
When the angle of a joint increases, it produces movement. Which type of movement is it? A. extension B. rotation C. flexion D.
Mandarinka [93]

Correct answer: A) Extension

Extension is a physical position that occurs when angle between the bones and the limbs of joint increases.

It takes place when there is a contraction of muscles and bones move the joint from a bent to a straight position, it is opposite of flexion, in which the angle between the bones and the limb at the joint decreases.

Example: During straightening of the leg, the angle between the tibia and femur increases, which shows extension has taken place.




8 0
3 years ago
Read 2 more answers
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