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dimaraw [331]
3 years ago
5

The bulk of facebook's revenue comes from:

Biology
1 answer:
neonofarm [45]3 years ago
6 0
The bulk of facebook's revenue comes from: advertising
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When a nutrient moves freely across the cell membrane from an area of higher nutrient concentration into an absorptive cell wher
kipiarov [429]

Answer: diffusion

Explanation:

Diffusion is the over all movement of molecules from one region where it is in high concentration to another another region where it is in lower concentration.

This movement continues until the concentration of both regions are equal. Smaller non polar molecules are able to diffuse through the lipid bilayer of the membrane .

Movement through the membrane is dependent on the concentration gradient, that is the difference in concentration between the two areas.

It is also dependent on the size of the molecule

5 0
3 years ago
Apoptosis involves all but which of the following?
LenaWriter [7]

Answer:

Apoptosis does not involve:

c. lysis of the cell

Explanation:

Apoptosis is a programmed cell death that occurs under normal physiological conditions and in a controlled manner. Normally seen in cell turnover, embryogenesis, also involved in processes of immune, nervous and endocrine systems.

The main morphological and biochemical changes seen during the apoptosis are the fragmentation of DNA by endonucleases, nuclear, chromatin and cytoplasmatic condensation, apoptotic bodies formation (membrane bound-vesicles form of cell parts) and the phagocytosis (digestion) of those bodies by the scavenger cells.

Apoptosis is regulated by cell- signaling pathways, the caspases, a family of cysteine proteases, are the ones involved in the process.

In the process there is no lysis of the cell as this could lead to a inflammatory response (just happens in necrosis) which would affect contiguous cells, and will involve immune cells. In apoptosis there is just a membrane blebbing, but it does not loss its integrity.

4 0
2 years ago
Why is eyesight not an important adaptation to life in a cave
vredina [299]
Think about it. Caves are dark, with little to no light. If there's no light, why would you need to see? There are far more important senses than sight in cases like these. Senses such as smell, hearing, and touch. Hope that helped.
6 0
3 years ago
What happens to electrons when pigments in photosystem 2 absorb light?
gladu [14]

When one of the many pigments in the photosystem II absorbs light, the energy is directed inward from pigment to pigment until and unless it reaches the center of reaction. There, energy is conducted towards P680, thus, boosting an electron to a higher level of energy.

5 0
3 years ago
Which DNA strand is complementary to TGTAGCTGCGCGT?
Anton [14]

Answer:

ACATCGACGCGA

Explanation:

In DNA

adenine pairs with thymine

cytosine pairs with guanine

7 0
3 years ago
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