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Tresset [83]
3 years ago
5

Contrast cartilage and bone, and state the advantages of a bony exoskeleton relative to a cartilaginous exoskeleton.

Biology
1 answer:
KatRina [158]3 years ago
4 0
Cartilage will break a lot easier than bone
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What molecule(s) link the light reactions (stage 1 of photosynthesis) to the Calvin cycle (stage 2 of photosynthesis)?
Zina [86]

Answer:

ATP and NADPH

Explanation:

The photosynthetic process carried out by plants involves two distinct stages: the light-dependent stage and the Light-independent stage. The light-dependent stage occurs in the thylakoid membrane of the CHLOROPLAST and it involves a series of chemical reactions that results in the formation of an energy storage molecule (ATP) and reduced electron carrier (NADPH).

These molecules enters the Calvin cycle or light-independent stage. The chemical energy of ATP and reducing ability of NADPH are used to phosphorylate and reduce a 3-carbon compound (PGA) in the Calvin cycle. These two molecules (NADPH and ATP) are important to keep the Calvin cycle in place. Hence, the Calvin cycle is dependent on the light reaction and this two molecules link the two stages.

4 0
3 years ago
Pleaseeee help!!!!!!!! I will mark you as brainlinest for correct answer!!!!!!!!!!
kolezko [41]
THE ANSWER IS THE THIRD ONE

7 0
3 years ago
Read 2 more answers
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
4 years ago
Which of the following best describes passive immunity?
sweet-ann [11.9K]
All of about is the answer
7 0
3 years ago
Help................. ​
Karo-lina-s [1.5K]

Answer:

Autotrophs are organisms that use light energy or energy stored in chemical compounds to make their own food.

1st order heterotrophs are organisms that eat only plants

2nd order heterotrophs are organisms that eat herbivores

3rd order heterotrophs: organisms that eat herbivores and other carnivores

Top group: carnivores

Explanation:

Producers are named as such because they produce their own food either by photosynthesis or chemosynthesis. These organisms are called autotrophs and include plants.

There are various levels of consumers. The first is first order heterotrophs, which feed on the producers. These are herbivores and include, for example, a deer feeding on grass.

The next is second order heterotrophs, which feed on the first order heterotrophs. E.g. an owl eating a mouse. These are carnivores

The next layer are also carnivores, third order heterotrophs which eat second order heterotrophs, for example a lion eating a zebra.

4 0
3 years ago
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