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Semmy [17]
3 years ago
5

True or False. Every somatic cell in your body has the same copy of DNA Explain your reasoning Answer:

Biology
2 answers:
Natalka [10]3 years ago
8 0

Answer:

false

Explanation:

All somatic cells have same genes but the genes whose product is not needed are turned off. Some genes are expressed constitutively and some genes are turned off and on depending upon the requirement of proteins.

mihalych1998 [28]3 years ago
4 0
True
All somatic cells have same genes but the genes whose product is not needed are turned off. Some genes are expressed constitutively and some genes are turned off and on depending upon the requirement of proteins.
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Use the principles of diffusion to explain why oxygen molecules in the tissues of the lung go into the blood
Keith_Richards [23]

Answer:

Oxygen molecules in the tissues of the lung diffuse into the blood because the concentration of oxygen in the lung's tissues is more than the concentration of oxygen in the blood.

Explanation:

Diffusion is the movement of molecules from the region of higher concentration of the molecule to the region of lower concentration of the same molecule. Molecules in diffusion move <em>downward the concentration</em> <em>gradient</em> created by difference in concentration between two regions until an <em>equilibrium (equal concentration in the two regions)</em> is established.

Oxygen molecules diffuse into the tissues of the lung when an organism breathes-in during the process of breathing. The molecules in the now oxygen-rich tissues eventually start diffusing into the blood in the lung because the blood passing through the lung is always de-oxygenated or has lower oxygen concentration compared to the tissues of the lung.

Oxygenated blood moves into the heart, pumps round the body by the heart, gets depleted of oxygen and eventually find its way back to the lung where the process is repeated.

Diffusion of oxygen from the tissues of the lung into the blood will keep happening as long as oxygen keeps getting dissolved into the lung's tissues and an equilibrium is yet to be established between the tissues and the blood.

8 0
3 years ago
Which of the following causes day and night to occur?
Sindrei [870]
The rotation of the Earth in its axis
7 0
3 years ago
Way an egg is so much larger then a sperm cell, need help.
Dmitry_Shevchenko [17]

Answer:

The egg contains both food and mitochondria in addition to its vital DNA, thats why it is much larger. The sperm cell has to be much smaller than the egg cell, because it is the one that swims. If a sperm cell were as big as an egg, it would not be able to move very fast nor very far.

3 0
3 years ago
List 4 chordate characteristics.
jek_recluse [69]

Answer:

notochord, dorsal hollow nerve cord, pharyngeal slits, and a post-an4l tail

Explanation:

had to censor second to last word but the 4 is an a

4 0
2 years ago
_____are needed for sexual reproduction.<br><br> Gametes<br> Pollen<br> Spores<br> Cells
muminat

Answer:

Gametes

Explanation:

Gametes are sex cells.

8 0
3 years ago
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