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bekas [8.4K]
3 years ago
5

The hormone , which is secreted by the pineal gland, influences the sleep–wakefulness cycles.

Biology
2 answers:
Bess [88]3 years ago
7 0
Melatonin is the answer
KonstantinChe [14]3 years ago
6 0
The hormone described above is the hormone Melatonin.
Melatonin is a hormone secreted by the pineal gland in the brain, which helps regulate other hormones and maintains the body's circadian rhythm. This rhythm is an internal 24 hour clock that plays a critical role when we fall asleep and when awake. When it is dark the body releases more melatonin. 
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Nataliya [291]

Answer:

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3 years ago
Why are proteins so important? What are some of the things that they do?
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Hope this helps :)
6 0
3 years ago
Compare and contrast a fossil with a trace fossil. Please help fast. I'm being timed.
andrew-mc [135]

Answer:

I'm going to go with b.

Explanation:

6 0
2 years ago
A 1:1:1:1 ratio of offspring from a dihybrid testcross indicates that ___________.
JulsSmile [24]
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7 0
3 years ago
The only phylum in the group Parazoans is ________. A. Porifera B. Cnidaria C. Lophotrochozoa D. Ctenophora E. Ecdysozoa
ludmilkaskok [199]

Answer:

A. Porifera

Explanation:

Parazoan is a sub-kingdom of animal consisting only of the phylum of sponges (porifera), having two tissue layers only and lacking a nervous system and true digestive cavity.

They have certain characteristics like: sponges are marine, but there are some freshwater sponges that enjoy their water without salt. Most sponges do not have any type of symmetry, but some are radially symmetrical and they come in a variety of shapes, colors, and sizes, they are multicellular, heterotrophic and lack cell walls. Unlike other organisms, sponges lack true tissues and organs.

The mesohyl functions as an endoskeleton in most sponges, and is the only skeleton in soft sponges. This mesohyl is stiffened by mineral spicules, by spongin fibers or both.

7 0
3 years ago
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