I also believe the answer is A.
1) D chromosomes
2) B a double helix
3)A chromosomes are made of DNA
4)A genes
Answer:
The gonads are reproductive organs responsible for the production of <u>gametes (sex cells) in their external secretion and in their internal secretion, hormones that exert their action on the organs involved in reproductive function.</u>
Explanation:
Gonads are glands that are part of two body systems: the endocrine system and the reproductive system; and there are two types of gonads: male and female, the first are the testicles and the second the ovaries and both produce steroid hormones (derived from cholesterol) exactly the same as those produced by the cortex of the adrenal glands.
No, amino acids are not alive.
Explanation:
Many violent volcanoes spew a lot of pyroclasts and gases such as carbon dioxide and sulfur dioxide high into the atmosphere. The fine pyroclast would linger in the atmosphere for months and even years blocking out the sun. This would cause vegetation to die out and decrease. Photosynthetic organisms re usual producers and the entry point of energy from the sun into ecosystems. Their death would mean the collapse of ecosystems.
Settling pyroclast would also blanket vegetation in thick layers hence also denying them access to sunlight. There would be a definite drastic decline in population and communities and ecosystems, and even extinction akin to the extinction even to the dinosaurs during the meteorite strike.
Learn More:
Check out a similarity with the extinction of dinosaurs;
brainly.com/question/12934291
brainly.com/question/10980466
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