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Alex
3 years ago
8

Puberty is initiated when the hypothalamus significantly increases secretion of

Biology
1 answer:
Tems11 [23]3 years ago
8 0

Answer:

hormones

Explanation:

hormones usually cause puberty. Causing the body to grow.

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The change of England's Biston betularia moth populations from light colored to dark colored is an example of _____.
Gennadij [26K]

<u>Answer:</u>

The correct answer for this is: Microevolution.

<u>Explanation:</u>

The change of England's Biston betularia moth populations from light colored to dark colored is an example of 'Microevolution'.

Basically, the change that occurs over time in the allele frequencies within a group of species or population is known as microevolution.

The four processes due to which this change occurs include gene flow, selection (natural and artificial), mutation and genetic drift.

4 0
3 years ago
The allele that codes for "having freckles" is dominant (f) over the allele that codes for "no freckles" (f). a heterozygous, fr
Inessa05 [86]
1/2 is the correct answer
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8 0
4 years ago
Read 2 more answers
Arrange according from largest to smallest in size:
Inessa [10]

Answer:

The correct answer is "Redwood tree; human being; Paramecium; White Blood Cell; Escherichia coli; Chickenpox virus; Ribosome; Prion fibril; Water molecule; Sulfur atom".

Explanation:

Redwood trees are gigantic trees, and its size can reach up to 90 meters.

The average size of a human being is 1.7 meters for males and 1.6 meters for females.

Paramecium are members of the protozoa genus, among the largest unicellular algae. Its average size is among 50 to 330 micrometers.

White Blood Cell are up to 17 micrometers in diameter.

Escherichia coli is a type of bacteria, as a prokaryotic organism is much more smaller than a eukaryotic cell such asa the white blood cell. Escherichia coli is up to 2 micrometers in diameter.

Chickenpox virus are among the largest viruses, they are from 150 to 200 nanometers in diameter.

Ribosomes vary on size depending if they are Prokaryotic or Eukaryotic, where the first are up to 20 nanometers and the second are up to 30 nanometers.

Prion fibrils are aggregates comprised of several protein units. It size varies depending on the number of proteins, but the ones containing around 200 units can reach up to 27 nanometers.

Water molecule is comprised of two atoms of oxygen and one atom of hydrogen, its size is measured with picometers (1 picometer is equal to 1000 nanometers). A water molecule has a size of 275 picometers.

Sulfur atom is the smallest in the list. Its size is around 100 picometers.

6 0
3 years ago
Diffusion is a passive process that accounts for the movement of respiratory gases across the capillary membranes of alveoli.
strojnjashka [21]

Answer:

True

Explanation:

Diffusion is a passive process (no energy required) in which the substance such as liquid and gases moves from an area of high concentration to an area of low concentration.

During respiration, carbon dioxide diffuses from the blood into the alveoli and oxygen diffuses from alveoli to blood across the respiratory membrane. The partial pressure of oxygen is low in the blood of the pulmonary capillaries and high in the alveoli. so diffusion allow movement of oxygen across the respiratory membrane from the alveoli into the blood.

Hence, the given statement is true.

4 0
3 years ago
What is a characteristic common to both diffusion and active transport
Svet_ta [14]
They both transport ions, sugars, and salts across the membrane
8 0
3 years ago
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