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LiRa [457]
3 years ago
9

What are some primary contributors to background radiation?

Biology
2 answers:
Viktor [21]3 years ago
6 0

Answer:

Plants, animals, and cosmic rays

Temka [501]3 years ago
3 0

Answer:

plants animals and cosmic rays

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What kind of tropism is this??
lora16 [44]

Answer:

phototropism

Explanation:

4 0
3 years ago
A human cell in prophase of mitosis can be distinguished from a human cell in prophase I of meiosis by the presence of (A) paire
Kobotan [32]

Answer:

B

Explanation:

7 0
3 years ago
The concentration of calcium ion in blood is found to be 1.21 mmol/L. What is this concentration in mEq/L?
garik1379 [7]

Answer:

concentration of calcium ion mEq/L = 1.21 x 2 = 2.42mEq/L

Explanation:

given

  • concentration of calcium ion in blood =  1.21 mmol/L
  • Concentration in mEq/L = Concentration in mmol/L x valence of the ion
  • but Valence of Ca2+=2
  • The valence electron is the number of electron present in the outermost shell. Calcium belongs to the group2 elements also known as the alkaline earth metal, and their valence electron is 2.

  • Hence, concentration of calcium ion mEq/L = 1.21 x 2 = 2.42mEq/L

where mEq/L  = milliequivalent per liter

8 0
3 years ago
According to chargaff's rule, if the dna of a species contains 20% adenine, what percent of guanine will it
Ket [755]
It will always epual the same amount of Guanine
7 0
3 years ago
Blue whales have 44 chromosomes in every cell. determine how many chromosomes you would expect to find in the following:Sperm ce
baherus [9]

Sperm cell: We expect to find 22 chromosomes.

The spermatozoon is a small cell (5 micrometers in diameter), much smaller than the ovum, but with a movable tail (a flagellum) 60 micrometers long. To be lightweight and mobile, to quickly reach the egg, the sperm gains space by minimizing its cytoplasm and compacting its DNA. Head is covered with the acrosome, a pocket full of enzymes that will be used to pierce the membrane of the egg.

It is a haploid cell because it contains half of the genetic material of the individual, lost at the time of meiosis during the process of spermatogenesis that the primordial germ cells undergo in the seminiferous tubules of the testes.


Egg Cell: We expect to find 22 chromosomes.

The egg is the sexual cell (or gamete) produced by the females of the animals.

Like all gametes, the egg is haploid, it contains half of the chromosomes of the future embryo, so the number of chromosomes will be 22 instead of 44. Then this egg will meet a sperm cell to gather their chromosome and form an embryo of 44 chromosomes.


Daughter Cell from Mitosis: We expect to find 44 chromosomes.

Mitosis, which ensures the birth of cells identical to the mother cell during asexual multiplication (so the number of chromosomes will remain the same, it will not divide in two).

Mitosis is an asexual cell division. This means that it is just a division of a mother cell into two daughter cells, which will inherit exactly the same genetic inheritance.


Daughter Cell from Meiosis II: We expect to find 22 chromosomes.

Meiosis is a particular mode of division of the living cell by which an initial cell with 2n chromosomes (in this case 2n = 44 chromosomes), a diploid stage, gives rise to four daughter cells possessing only n chromosomes, a haploid stage (n = 22 chromosomes). Meiosis is one of the forms of cell reproduction, this process is performed on the gonads to produce gametes.

4 0
3 years ago
Read 2 more answers
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