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ratelena [41]
3 years ago
12

The first land vertebrates appeared in the

Biology
1 answer:
Elanso [62]3 years ago
3 0
Hi Kylia! Thanks for asking a question here on Brainly. <span>✉

The first land vertebrates appeared in the </span><span>Devonian which was about 360 million years ago.

</span><span>Hope that helps! ★ <span>If you have further questions about this question or need more help, feel free to comment below or leave me a PM. -UnicornFudge aka Nadia </span></span>
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A man with normal vision and a colorblind woman have children together. We can expect that _________ of their sons and _________
MrMuchimi
The answer would be E because boys inherit the Y chromosome from the dad which in this case would have the color blind trait. Girls don’t get the y from the father to get the color blind trait not be color blind because girls have 2 (X) chromosomes. Hope this helps
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3 years ago
1. The bronchi and alveoli organs are part of which organ system?
Anastaziya [24]

Answer:

respiratory system

Explanation:

The bronchi become smaller the closer they get to the lung tissue and are then considered bronchioles. These passageways then evolve into tiny air sacs called alveoli, which is the site of oxygen and carbon dioxide exchange in the respiratory system.

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2 years ago
Which of these would not be considered an invasive species?
Marysya12 [62]

Answer:

C) In 1946, the Argentinian government imported fifty beavers from Canada, which were to be released in Cami Lake with the intention of creating a commercial fur trading industry. Though a viable industry ultimately failed to materialize, the introduction of the beavers into the region has had far-reaching consequences.

7 0
3 years ago
Is glycerol a <br><br> A) lipid<br> B) protein<br> C) carbohydrate
Rama09 [41]

Answer:

a

Explanation:

a lipid is the right answer

4 0
2 years ago
Read 2 more answers
Metabolic pathways can be controlled through the availability of enzymes and modulation of their catalytic activities. Enzyme av
postnew [5]

Answer: a) substrate and cofactors b) covalent modification

Explanation:

Metabolic pathways involve all the chemical processes takes place in the enviornment or in an organisms.The metabolic pathways are controlled through the catalytic activities of enzymes.

The availability of enzyme is regulated  by substrate and cofactors present in enzyme and enzyme activity is commonly regulated via covalent modification.

Enzymes are highly selective in nature and bind to a specific substarte only. The active site in enzyme binds with the substrate to form enzyme substrate complex. Coactors assist the enzyme activity, without cofactor enzyme can not perform its activity.

Hence enzyme availibility is regulated by  substrate and cofactors regulates.

Covalent modifications regulates activity of enzyme as it involves addition and removal of chemical group to synthesis required protein. It can change the chemical properties of the site by targeting one or multiple amino acid.

Thus the correct answer is a) substrate and cofactors b) covalent modification

8 0
3 years ago
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