When you are approaching a river lock, you are expected to sound one prolonged blast and one short one in order to signal to the lock attendant that you want to pass through. You are to sound the blast when you are about one mile away from the river lock. The attendant will reply you with one of the traffic signals in order to instruct you about what to do.
Mitosis is when the cell begins to divide and the cell membrane and the cytoplasm split apart and the chromesomes that act as a nuclei get replaced and a nucleus is formed in 2 identical copies of a diploid cell (daughter cells )
The Energy-Requiring Steps of Glycolysis. In the first half of glycolysis, energy in the form of two ATP molecules is required to transform glucose into two three-carbon molecules.
Answer:
B) Heterozygotes are less susceptible to the malaria parasite, so there is an advantage to being heterozygous.
Explanation:
Sickle cell anemia is a recessive condition in which the red blood cells (RBCs) become sickle shaped. Due to the abnormal shape they are not able to transport oxygen efficiently which proves lethal for the person. Both, homozygous dominants and heterozygotes survive.
However in African countries with high rate of malaria, heterozygotes are selected over the dominant homozygotes. Dominant homozygotes have all normal RBCs which make them susceptible to malarial parasite since RBC is the host cell for it.
Heterozygotes produce some normal RBCs and some sickle shaped. Malarial parasite is not able to attack sickle shaped RBCs because of its unusual shape. So heterozygotes are less susceptible to malaria. Since they also have some normal RBCs, they are not affected much by sickle cell anemia too. Hence, heterozygotes evade both sickle cell anemia and malaria and heterozygous is the most advantageous genotype in this case.
The answer is A
Electron micrograph pictures showing a blue center surrounded by 2 layers.