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Hoochie [10]
2 years ago
11

Why do scientists assume the first photosynthetic organisms were anoxygenic?

Biology
2 answers:
Scrat [10]2 years ago
7 0

Answer:

scientists are always finding new things

Doss [256]2 years ago
5 0
Because photosynthesis produces oxygen, scientists assume the first photosynthetic organisms were not consuming oxygen, but producing it.
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What are the nonliving components of the environment that shape an ecosystem?
katrin [286]
The best answer to the question 'What are the nonliving components of the environment that shape an ecosystem?' would be letter d. Abiotic factors are those components of the environment that are non-living or does not have life. All the other choices have life.
4 0
3 years ago
A hypothetical three-step metabolic pathway consists of the intermediates W, X, Y, and Z, and the enzymes that catalyze the reac
GenaCL600 [577]

Answer:

ZBWCYAX

Explanation:

Equation for the intermediates: Z↔W↔Y↔X

1) B catalyzes the breakdown of Z, therefore inhibiting B leads to the build up of Z.

2) If enzyme C is inactive then the organism will not  receive Y to grow, thus Y is a by-product of C.

3) If A is inhibited then W, Y and Z build except for X, thus it make sense that A catalyzes a reaction that leads to X as a by-product.

4) Inhibiting C leads to the reaction toward making Z and W, thus it catalyzes the breakdown of C directly and Z indirectly.

3 0
3 years ago
Atropine is sometimes used to dilate the pupil for an eye examination. which receptor would atropine block?
grigory [225]

Atropine would block the receptor called muscarinic acetylcholine receptors present in the eye.

Atropine is the Anticholinergic agent which is also known as parasympatholytics. The activity of neurotransmitters at the receptors leads to pupil constriction.

Atropine is used to block these receptors that allow the pupillary muscles to relax. This causes the dilation of the pupil.

Atropine is the mydriatics that is used for pupillary dilation to conduct a detailed examination of eye diseases.

without this medication, the pupil will only dilate in the darkness. However, doctors cannot examine the eye problems as there is darkness as they need light for checkups.

If you need to learn more about Atropine, click here:

brainly.com/question/14080697

#SPJ4

7 0
1 year ago
1. Which type of soil does Kenneth have?
Blababa [14]

Answer:

homie got dirt

Explanation:

7 0
3 years ago
Read 2 more answers
What 3 types of larvae begin as plankton?
Svetllana [295]

Answer:

sponges, crabs, sea stars, snails, worms, and fishes.

Explanation:

The animal groups with larvae in the plankton include, sponges, crabs, sea stars, snails, worms, and fishes. These tiny larvae are not the only ones out there floating around in the plankton.

4 0
2 years ago
Read 2 more answers
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