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Katen [24]
3 years ago
6

If two species physically capable of mating but fertilization is unable to occur, this is an example of what type of reproductiv

e barrier?
Biology
1 answer:
igomit [66]3 years ago
4 0
<span>This barrier is known as reproductive isolation and and generally occurs when two species have incompatible genitalia which are unable to function together. It can also occur when the sperm of the male species is unable to be fertilized by the female, regardless of genital compatibility.</span>
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Clathrin coated vesicles bud from eukaryotic plasma membrane fragments when adaptor proteins, clathrin and dynamin-GTP are added
KonstantinChe [14]

Answer: Clathrin cages assemble, vesicles form but cannot be pinched of but no disassembly occurs so the vesicles remain coated in clathrin.

Explanation:

Endocytosis is a cellular mechanism that allows the introduction of extracellular material into the cell. Clathrin-coated vesicles act to incorporate different molecules that are recognized by specific proteins located in the clathrin-coated pits. Upon invagination of a portion of the plasma membrane, the material is transported to its final intracellular destination.

<u>Clathrin is a protein that forms the lining of cell membrane microcavities where various receptors are located. Once a particle is recognized by the receptors, invagination of the plasma membrane occurs, which then fuses to form an endocellular vesicle.</u> When vesicle budding occurs, the vesicle is detached from its attachment to the membrane with the help of a GTPase protein called dynamin. Then, the vesicle is freed from clathrin by the action of a type of ATP-ase called Hsp70-ATP and docks to late endosomes that are immediate precursors of lysosomes, fusing the membranes of both. The fission of the clathrin-coated vesicle is controlled by the GTPase dynamin and it has been proposed that dynamin acts by generating the necessary force to strangle the "neck" and cleave the vesicles from the membrane. So they are mainly involved in the cleavage of newly formed vesicles from the membrane of one cell compartment, their orientation, and their fusion with another compartment. Also, without the dynamin, vesicles are not freed from clathrin.

<u>In the absence of dynamin, vesicles are formed but the membrane fusion or pinching off will not occur. Then, invaginated coated pits will be found.</u>

7 0
3 years ago
how will the movement of water affect a cell if it is transferred a cell if it is transferred from a hypotonic solution to a hyp
Sliva [168]

Answer:

The cell will shrink and wrinkle

Explanation:

Hypertonic solutions have more solute than solvent. The external solution will have a higher osmotic pressure than the cell contents and therefore water will pass out of the cell which will then shrink.

6 0
3 years ago
Which one of these is not a characteristic of a hypothesis?
weqwewe [10]

Answer:

Uhh-

Explanation:

Bruh there's no pic so ... I dunno lol. Just in case this helps you, hypothesis means an educated guess. There's different meanings, for science it's an idea. But mostly it means guessing.

I didn't help Ik XD

And

Sorry

I

Couldn't

Helppp

.............

:(

3 0
3 years ago
Joy has a DNA sample from each of five unknown animals. She wants to find the molecular mass of each sample to determine which s
murzikaleks [220]
Answer is B since it uses strains and differential transformation to see
3 0
3 years ago
What condition must be met for conduction to occur
Stolb23 [73]

Answer:

The molecules of the substances must be touching.

Explanation:

Conduction is the process by which heat energy is transmitted through collisions between neighboring atoms or molecules

3 0
2 years ago
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