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ankoles [38]
4 years ago
14

What was Galen’s contribution to knowledge?

Biology
1 answer:
Nadusha1986 [10]4 years ago
6 0
The structure of the human body.
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Which of the following BEST explains the timing of the classical pathway of complement fixation,relative to the other pathways o
SOVA2 [1]

Answer:

<h2>A</h2>

Explanation:

1. There are 3 pathways of complement activation:

i) the classical pathway;

ii) the MB-lectin pathway; and

iii) the alternative pathway.

2. The classical complement pathway;  for activation, it requires antigen(Ag) antibody(Ab) complexes.

3. While the other pathways can be activated by various ways.

as here,  No target for C1qrs exists on the surface of the pathogen in the earliest stages of the response to it.

8 0
4 years ago
White eye color is an x-linked trait in one line of fruit flies. white eyes is recessive to red eyes. if a red-eyed female and a
netineya [11]
The male fruit fly has an XY profile of the sex chromosomes, and the female has an XX profile of the sex chromosomes.
If a male is white-eyed, then it must have a white recessive allele on his only X chromosome and the red eyed female can be homozygous (having two dominant red eye alleles) or heterozygous (having both a dominant and a recessive allele).
If the female is homozygous then all of the offspring will be red-eyed, and if she's heterozygous then half of the offspring will be white eyed. (see the table provided below)

5 0
3 years ago
Which of the following statements are true of mitochondrial proteins that are synthesized in the cytosol?
Nana76 [90]

The following are statements that are true about mitochondrial protein synthesized in the cystol.

  • Proteins cross both the inner and outer mitochondrial membranes as they are imported
  • Chaperone proteins help draw the proteins inside the mitochondrion.

  • Protein transport into mitochondria is powered in part by ATP hydrolysis.

<h3>Mitochondrial protein.</h3>

Mitochondrial is an organelles found in organisms which is refer to as the power house and help to produce energy for cells, for metabolic activities, cell proliferation and so on.

Mitochondrial proteins are normally encoded by nuclear genes and they are produced on cytosolic ribosomes and imported into mitochondria.

Mitochondrial Protein help to Import protein and Process the protein in Heart Disease. imported into mitochondria.

Therefore, The following are statements that are true about mitochondrial protein synthesized in the cystol.

  • Proteins cross both the inner and outer mitochondrial membranes as they are imported
  • Chaperone proteins help draw the proteins inside the mitochondrion.
  • Protein transport into mitochondria is powered in part by ATP hydrolysis.

Learn more about mitochondrial protein here.

brainly.com/question/20398312

3 0
3 years ago
The endosymbiotic theory states that eukaryotes evolved from prokaryotes. Which statement is part of the endosymbiotic
tatyana61 [14]

Note about the question:

Statements are missing, and I failed to find the complete question. So here I give you some details about the theory that will help you to indetify the correct statement.  

Answer and Explanation:                            

The endosymbiotic theory essentially states that some organelles of the eukaryotic cells, such as mitochondria and chloroplasts, were once free-living bacteria. Probably, these organisms must have been phagocytosed but not digested by another cell. On the contrary, these bacteria were able to adapt to their host in such a way that the two cells established a dependent relationship with each other.

It is speculated that chloroplasts derivate from cyanobacteria and that mitochondria derivate from rickettsias.

Cells would be beneficiated from this new bond, at the point that they could not survive by themselves anymore.

This theory is supported by a few characteristics of the chloroplasts and mitochondria that suggest that they once were a free cell. For example,

  • Both organelles present their genetic material. This DNI is independent of the cell´s DNA, is bi-catenary and circular, identical to the bacterial DNA, and very different from the one of the eukaryotic cells.
  • These organelles do not divide by mitosis. Instead, they do it by binary fission and are capable of synthesizing their ribosomes and organelles.
  • Both organelles present a double membrane, a characteristic that reinforces the idea of being phagocyted. The internal membrane looks identical to the bacteria membrane, while the external membrane looks like the eukaryotic one.
  • In fact, in this internal membrane are placed the energy centers, exactly as it occurs in bacterias membrane.
  • Finally, the sizes of the organelles are similar to the size of some procaryotes.
8 0
3 years ago
Which of the following is a reason for creating hybrid plants?yield more cropsincrease growing seasondecrease resistance to herb
NikAS [45]

The main reason for creating hybrid plants is to yield more crops. This is primarily due to characteristics of hybrid plants which produces favorable traits such as resistance to certain diseases and increase in crop yields than their parent plants.

Answer- Option 1 - yield more crops

5 0
1 year ago
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