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9966 [12]
4 years ago
11

Eggs have species specific receptors on their outer surfaces to which sperm must attach if fertilization is to occur

Biology
1 answer:
mafiozo [28]4 years ago
6 0
The  question is; would a drug that binds irreversibly to these receptors be an effective contraceptive in mammals?, the answer is;Yes; because if the receptors are blocked the sperms will not be able to penetrate the zonal pellucida of the egg.  Contraceptives prevents pregnancy by interfering with the normal process of ovulation, fertilization, and implantation.
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Compare and contrast visible light and ultra violet rays coming from the sun. A) Ultraviolet waves are energy waves and light is
kari74 [83]

Answer:

C) Both are waves of energy, but ultraviolet waves cannot be seen.

Explanation:

Both visible light and ultraviolet are two manifestations of the same thing: electromagnetic radiation (which is, basically, energy in one of its forms). They both travel empty space as waves, but visible light has a longer wavelength, which means that the distance between succesive peaks of the wave is larger than that of ultraviolet radiation. Visible light just happens to have a wavelength in the range our eyes are capable of seeing, but ultraviolet has a shorter wavelength than that, therefore we cannot see it.

3 0
3 years ago
In prokaryotes, new mutations accumulate quickly in populations, while in eukaryotes, new mutations accumulate much more slowly.
musickatia [10]

In prokaryotes, new mutations accumulate quickly in populations, while in eukaryotes, new mutations accumulate much more slowly. The primary reasons for this are prokaryotes reproduce quickly and have vast populations.

<h2> Prokaryotes V/S Eukaryotes</h2><h3>Prokaryotes</h3>

Prokaryotes are organisms consisting of cells that don't have cell nuclei or any organelles that are enclosed in membranes. It follows that prokaryote's DNA is not contained within a nucleus.

The following components could be found in a normal prokaryotic cell:

  •  The membrane enclosing and guarding the cell is known as the cell wall.
  • All of the cell's internal components, excluding the nucleus, are called cytoplasm.
  • Some prokaryotic cells have filaments made of proteins called flagella and pili.
  • A nucleoid is a cell structure that resembles a nucleus and contains genetic material.
  • A plasmid is a little DNA molecule with independent reproduction.
<h3>Eukaryotes</h3>

Eukaryotes are organisms made up of cells with membrane-bound organelles and a nucleus that contains DNA in the form of chromosomes. Eukaryotic organisms can have several cells or just one cell. Eukaryotes make up all animal life. Protists, fungi, and plants are examples of additional eukaryotes.

Learn more about Prokaryotes and Eukaryotes here:-

brainly.com/question/1698324

#SPJ4

7 0
2 years ago
In order of importance, the world's four most important crop species are
astra-53 [7]
In order of importance, the world's four most important crop species are: CORN, WHEAT, RICE AND POTATOES. 
Corn is the most produced grain in the world and it is used as raw material for production of different types of food. Wheat is the leading source of vegetable protein in the world, it is usually grown in dry and cold climates. 
8 0
4 years ago
What kind of cell were you able to make, animal or plant?​
QveST [7]

Answer:

eukaryotic

Both plant and animal cells are eukaryotic, so they contain membrane-bound organelles like the nucleus and mitochondria

5 0
3 years ago
The ability to curl one's tongue into a U-shape is a genetic trait. Curlers always have at least one curler parent but noncurler
irina1246 [14]

Answer:

A noncurler has a genotype cc.

Explanation:

If curlers always have at least one curler parent, it is possible being "curler" will be related to a dominant allele, in this example, "C".  So, being "noncurler" could be a recessive trait. Noncurler can have one or both parents who are curlers, and this is concordant with a recessive inheritance if both parents are heterozygous (Cc) (with a probability of 25% of being "noncurler"). Also, it is possible if one parent is heterozygous and the other is homozygous for c (Cc x cc), this with a probability of 50% ob being "noncurler".  

The Punnett square shows this clearly.

6 0
3 years ago
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