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bearhunter [10]
3 years ago
15

2. A high school student decides to do an experiment about hamsters. He wants to know the effect

Biology
1 answer:
Lerok [7]3 years ago
8 0

Answer:

a

Explanation:

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Two or more substances that can be easily separated by physical means form a ____
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Element is the answer to this
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Consider the predominant types of alternative splicing events that occur in mammals. Which of the following choices represent mR
Nataly_w [17]

As the question is incomplete i have added the complete question in ask for detail section.

Answer:

The correct options are:

A-C-E-G-I

A-C-E-I

A-C-G-I

Explanation:

Alternative splicing of RNA produces many mRNA strands from primary RNA transcript. When alternative splicing of RNA occurs, all the introns and some exons are removed. The removal of these exons produces different mRNA strands which are then translated into diffident kinds of proteins. Alternative splicing of RNA can highly increase the number of new produced proteins from same gene.

5 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
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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
Which part of pakicetus anatomy most suggests that it is an ancestor of whales
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Answer:

Fossils of Ambulocetus

Explanation:

Fossils of Ambulocetus show that it was about 3 meters long. It had hind legs which were more suited for swimming than for walking. It could hear very well under water, and its teeth resembled those of modern cetaceans. Its limb anatomy suggests that it was slow on land and in the water.

3 0
3 years ago
Match each description to the appropriate biome
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Answer:

desert

taiga

tropical savanna

tundra

tropical  rainforest

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