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MariettaO [177]
3 years ago
14

Which biome is characterized by permafrost

Biology
2 answers:
mr_godi [17]3 years ago
7 0

B) Artic Tundra is characterized by permafrost.


DerKrebs [107]3 years ago
4 0
The answer is B.) Arctic tundra

plz thank me and mark me as brainliest, it motivates me to answer more of your questions :)
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Arrange the order of events for the internalization of LDL particles into cells:
ElenaW [278]

Answer:

The correct answer is "5-1-3-2-4".

Explanation:

Internalization of LDL particles into cells, is needed to form the intracellular vesicles known as endosomes. The order of events that allow for this process are:

5) LDL receptors migrate to the cell surface and cluster in clathrin-coated pits. Clathrin acts directing the receptors to the cell membrane region where endosomes are formed.

1) A combination of cholesterol and apolipoprotein binds to LDL receptors and becomes internalized as endocytotic vesicles. Once the receptors are in the proper cell membrane region, cholesterol and apolipoprotein are bound and internalized.

3) Several endocytotic vesicles fuse to form an endosome.

2) The environment of the endosome becomes acidic, which causes the LDL to dissociate from its receptor; additionally, the endosome fuses with a lysosome. LDL should be dissociated from its receptor since it is going to be degraded in the following step.

4) The LDL particle is degraded by the lysosome. This takes place after endocytosis, when LDL particles are transported into lysosomes once they are fused, cleaving the cholesterol esters into cholesterol and fatty acids.

6 0
3 years ago
PLEASE HELP ASAP!!
castortr0y [4]

A is the correct answer!

- water can moderate temperature v. well that's why it's used as a cooling agent

- water expands upon freezing (that's why ice floats on water!)

3 0
3 years ago
A 30-kg object is falling in air with a force of 294 N due to gravity, and experiences a force of 50 N due to air resistance. Wh
11Alexandr11 [23.1K]

Answer:

derivation of newton second law of motion

motion states thay the acceleration of a system is directly propotional

w=mg

5 0
3 years ago
How much photosynthesis occurs in the ocean?
lbvjy [14]

Answer:

Scientists estimate that 50-80% of the oxygen production on Earth comes from the ocean. The majority of this production is from oceanic plankton — drifting plants, algae, and some bacteria that can photosynthesize. One particular species, Prochlorococcus, is the smallest photosynthetic organism on Earth.

Explanation:

4 0
3 years ago
State why iodine is described as a p block element​
pychu [463]

Answer:

Group 17  Melting point 113.7°C, 236.7°F, 386.9 K  

Period 5  Boiling point 184.4°C, 363.9°F, 457.6 K  

Block p  Density (g cm−3) 4.933  

Atomic number 53  Relative atomic mass 126.904  

State at 20°C Solid  Key isotopes 127I  

Electron configuration [Kr] 4d105s25p5  CAS number 7553-56-2

Explanation:

4 0
3 years ago
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