The posterior opening is called the anus
1. B: AA or aa (homo means "the same," these are identical traits.)
2. B (hetero means "different", and these are different types of traits."
Persons with O blood have neither antigen a nor antigen b on their red blood cells but have antibody anti-a and antibody anti-b in their plasma.
ABO blood grouping was discovered by Austrian scientist Landsteiner. It consist of four blood groups- A, B, AB, & O.
Red blood cells have certain extension of the proteins that are called antigen. Two types of antigens are there antigen a & b. The RBCs which have a particular antigen will not have the antibody against the same.
Blood Group A has antigen A and antibody B. Blood group B has antigen B and antibody A. Blood group AB has both antigen and no antibodies while blood group O has no antigen and antibody A & B.
To learn more about red blood cells here
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Answer: Assuming you mean 'Which of the following is the correct complementary RNA strand?' The answer is D.
Explanation: This is because RNA is A=U G=C T=A
This is the <span>Fayum </span>depression. Here, fossil evidence of a primate ancestor<span> was found predating the divergence between </span>hominoids<span> (apes and </span>humans<span>) and </span>cercopithecids<span> (Old World monkeys). The fossil of a single species </span><span>lived around 30 million years ago in modern-day Egypt and resembled the current New-World monkeys. </span>
