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Andrej [43]
3 years ago
9

True or False: In human beings, fertilization occurs externally.

Biology
1 answer:
MariettaO [177]3 years ago
6 0

Answer:

False.

Explanation: Fertilization is a process in sperm cell combine with egg cell.

In human beings, fertilization occurs internally. During fertilization, sperm of male combine with egg of female inside the female body which changes into zygote. After sometime, zygote turns into a new baby. About nine months, the baby comes out from the body of female.

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Which best describes how the fossil record supports the theory of evolution?
kipiarov [429]
Fossil records show us that over time animals have 'changed' and become better adapted to their surroundings and so we can see similar characteristics in a horse from 100, 000 years ago in our present day horses. This supports the theory of evolution
4 0
3 years ago
Scientists have found ash in certain layers of sediment in an area in northern China. This is evidence that a volcano erupted in
Juliette [100K]

Scientists can find out when the volcano erupted by determining the age of the fossils in the ashy layers of sediment in area.

<h3>What is a Volcano?</h3>

This is defined as a vent or opening where lava erupts on to the surface of the Earth.

The age of the fossils in the ashy layers of sediment in area will help to determine the time when the volcano erupted.

Read more about Volcano here brainly.com/question/440765

8 0
2 years ago
Note that the lac enzyme continues to be produced even in the absence of lactose. Why is this a problem? Try dragging the lac op
aniked [119]

Answer:

If the lac enzyme continues to be produced even in the absence of lactose, the cell will be expending energy unnecessarily and this will be a problem for the supply of energy for other metabolic processes.

If the lac operator gene is dragged to any stretch of DNA, that gene may provide an inadequate reading generating a mutation.

Explanation:

The lac operon is an essential molecule for the transport and metabolism of lactose in microorganisms. This molecule has a fundamental function in the life of these single-celled organisms and must be synthesized immediately when lactose is present in the organism, however, its synthesis must be stopped as soon as the lactose is metabolized, otherwise the cell can spend energy unnecessarily preventing others Metabolic processes take place, which is a big problem if you only have one cell.

In addition, if for some reason, the lac operon gene is dragged on the DNA strand, an incorrect reading of the DNA bases can occur, which can cause mutations.

4 0
3 years ago
Which of the following is not a characteristic of all life
Alexeev081 [22]

the answer could be breath oxygen or respond to stimuli. Hope this helps!

8 0
3 years ago
What is the name for the type of white blood cell that produces antibodies that help the body fight infection? A. antibodies B.
Scorpion4ik [409]
D.    Hope this helped. :D  
4 0
3 years ago
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