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Anettt [7]
3 years ago
5

An ectoderm gives rise to

Biology
1 answer:
olasank [31]3 years ago
7 0
An ectoderm gives rise to hair, skin, nails or hooves, and the lens of the eye.

Hope this helps :)
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Secondary succession is often found in which of the following
tia_tia [17]

the most relative answer would be coral reef all the others are rocks and a big river and they are not secondary successions

8 0
3 years ago
What does happen with a human body after death?
SCORPION-xisa [38]

Answer:

Once the heart stops beating, that means the blood in the body is no longer circulated, meaning that gravity starts to do its work. The blood starts to pool (liver mortis) at the bottom of wherever the body was positioned (which can help indicate if a body has been moved since they died in homicide cases etc.), and the body starts to turn that green-ish blue color, with a dark-purpley color forming at the bottom of wherever gravity takes it (for example, if the body died and remained in a position standing up, then the blood would pool at the feet, whereas if the body died and remained laying on its back, then the pooling would occur in the back area of the body). Additionally, rigor mortis (you can remember it as being <em>rigid</em>) occurs, which is when the body locks up, so the joints lock and are unable to move, which is why it is often hard to get rid of/pack up and throw away a body because over the span of several hours the body locks up (it eventually wears off). Lastly, we have algor mortis, which is the change in temperature of the cadaver. Since the blood is no longer circulating, the body has nothing to retain a constant temperature anymore. The body will begin to change the temperature accordingly based on the surrounding temperature (environments that are hotter than the body will heat it up and similarly to cooler environments). If the body is found before it reaches the local temperature, then the current temperature can be used to help estimate and determine the time of death (there is a formula for this, but I'll leave it up to you if you want to look into it). After a few days, the body will start to decompose, and it will inhabit insects, especially flies and such, and the stage of development of the larvae and/or fly can also help estimate and determine the time and date of death.

I hope this helps :) lmk if you need anything else

3 0
2 years ago
The lac operon is an inducible system because the transcription of the operon occurs in the presence of an inducer (allolactose)
joja [24]

Answer:

A. True

Explanation:

Allolactose is an example of an inducer, a small molecule that triggers expression of a gene or operon. The lac operon is considered an inducible operon because it is usually turned off (repressed), but can be turned on in the presence of the inducer allolactose.

6 0
3 years ago
Read 2 more answers
Which of the following statements is true of aquatic biomes?
katovenus [111]

Answer:

B: Freshwater biomes are a vital source of drinking water.

Explanation:

It's not A because oceans are part of marine biomes, and oceans contain 97% of the Earth's water and covers 71% of the Earth's surface.

It's not C because marine biomes supplies more oxygen than freshwater biomes. Marine algae supply much of the world's oxygen supply, and they take in a huge amount of atmospheric carbon dioxide.

It's not D because freshwater biomes include streams, rivers, ponds, and lakes. Aquatic biomes include oceans, coral reefs, and estuaries.

It's B because freshwater biomes are very important to our survival because they supply people with more than half of their drinking water.

7 0
3 years ago
A blank is the basic structure molecule making up the plasma membrane.
Gnoma [55]
Phospholipid Bilayer
4 0
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