Answer:
A. Antibodies to A and B are present in the red cells.
Explanation:
AB positive is a blood type with the presence of A and B antibodies in the red blood cells, with the absence of A and B antigens. This blood type is referred to as the “universal recipient” because individuals who are AB positive can receive from all blood types including O, A and B. AB positive is only able to donate blood to patients who are AB positive AB is referred to the rarest blood type.
Therefore Fred's red blood cells have A and B antibodies.
Answer:
Nucleus and acrosome
Explanation:
Human sperm is the male gamete or sex cell formed by spermatogenesis. It is made of a head, neck, a middle piece and a tail. The sperm head consists of a haploid nucleus and anterior to nucleus, an acrosome. The nucleus contains DNA and nuclear protein and it transfers genetic features from the male to the next generation. The acrosome contains an important enzymes, hyaluronidase and acrosin. These enzymes help to enter head into an ovum.
The answer is C because C represent plants and plants produce oxygen and absorb CO2
Answer:
Males defend a large harem of females and will fight with other males to maintain dominance and access to their harem.
Explanation:
In walruses, the male will fight with other males in order to defend its dominance and access to harem. Harem refers to a group of few males and large number of females and their offspring. The male fight with each other in order to mate with the females of the group. The male who wins the fight will be the leader of the group and has the authority to defend his group from predators and mate with the females.
Toothpicks Have Helped Change How People Use Them For Cleaning Wise
