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Brilliant_brown [7]
3 years ago
15

The belief that children's immune systems need to be exposed to viruses and bacteria in order to strengthen them, but that child

ren are overprotected from this exposure, is called the __________.
Biology
1 answer:
andreev551 [17]3 years ago
4 0

Answer:

hygiene hypothesis

Explanation:

mark brainliest

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The demographic transition model show population change over time. It ilustrates how birth rate and death rate affect the total
Dmitry_Shevchenko [17]

Answer: In Stage 4 of the Demographic Transition Model birth rates and death rates are both low, stabilizing total population growth. The decline in both birth and death rates of most Stage 4 countries have been attributed to strong economies, highly educated citizens, ample healthcare systems, the migration of people from rural communities to cities (Bulgaria)

Explanation: i dont know if it's correct to them

8 0
3 years ago
If meiosis failed to occur in both male and female worms the zygote nucleons would resemble diagram
den301095 [7]

Tetraploidy will occur.

<h3><u>Explanation</u>:</h3>

The process of sexual reproduction is very necessary to maintain the genetic setup of the species over the races.

The normal chromosome content of a cell is called diploid state of cell. Its represented by the expression 2n. The cell division that takes place before the gamete formation is called meiosis. This cell division makes the chromosome number of the cells halved. So haploid cells are produced. Its represented by n.

Now as the gametes fuse, both the n becomes 2n and diploid state is regained.

But if the meiosis don't occur in the gametes, the gametes will remain 2n. So after fertilization, it becomes 4n. This state is called tetraploidy.

6 0
3 years ago
Why is it difficult to find the fish named after former president Barack Obama
xz_007 [3.2K]
There are many fish in the world.
but it’s probably not that hard tbh.
6 0
3 years ago
What causes air to rise in ‘lifting due to topography?’
Marina86 [1]

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heating of the mountain slope by the sun

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Multicellular organisms use cell division, mitosis, for growth and the maintenance and repair of cells and tissues. Single-celle
Nat2105 [25]
For the first question the answer is D
For the second question the answer is B
8 0
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