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aivan3 [116]
3 years ago
13

Which statement best describes the scientists who have contributed to our current body of scientific knowledge?

Biology
2 answers:
AlekseyPX3 years ago
5 0

Answer:

I say A they were mostly from Europe

Explanation:

andrey2020 [161]3 years ago
4 0
A mostly from Europe.
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while the light reactions of photosynthesis occur in the chloroplast thylakoids the dark reactions occur in
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Answer:

The chloroplast is involved in both stages of photosynthesis. The light reactions take place in the thylakoid. There, water (H2O) is oxidized, and oxygen (O2) is released. ... Once the light reactions have occurred, the light-independent or "dark" reactions take place in the chloroplast stroma.

Explanation:

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7 0
3 years ago
Human blood types are characterized by the presence absence of surface markers known as a tigers on the surface of red blood cel
zalisa [80]

Answer:

characterized by presence or absence of antigens

the blood types are A, B, O, AB

Explanation:

There are two antigens and two antibodies that are mostly responsible for the ABO types.  The specific combination of these four components determines an individual's type in most cases. Erythrocytes and serum were related to the presence of antigens on these erythrocytes and antibodies in the serum. these antigens  are A and B, and depending upon which antigen the erythrocytes express, blood either belonged to blood group A or blood group B. A third blood group contained erythrocytes that reacted as if they lacked the properties of A and B, and this group was later called "O" blood group. The fourth blood group AB, was added to the ABO blood group system. These erythrocytes expressed both A and B antigens.

Blood group   Antigen present on RBC    Antibodies in serum    Genotype(s)

      A                        antigen A                             anti-B                     AA or AO

      B                        antigen B                             anti-A                     BB or BO

      AB              both A and B antigen                 none                         AB

      O                           none                           anti-A and anti-B           OO

4 0
3 years ago
after carbohydrates and proteins are digested, what types of smaller nutrients are absorbed into the blood
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Small sugars (monosaccharides and disaccharides) glucose fructose, sucrose etc
Amino acids
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Spinal traction with metal tongs in the skull is used to treat a fracture of the
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The answer to this question would be: vertebrae 

In vertebrae fracture, traction is important to assure immobilization of the vertebrae. Movement can cause the fragment of bone in the fracture damaging the neural tissue in the vertebrae.
To ensure no movement in the neck, metal tongs can be put on the skull. The tongs will help fixate the skull with the shoulder.
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3 years ago
Ecosystem productivity is principally limited by
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Is the letter A) sunlinght and nutrient availability
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