Helper T cells are found in the <u>Thymus.</u>
Explanation:
Immature T-cells are formed in the bone marrow, just like any other blood cells, through the process of hematopoiesis. These immature T cells are then transported to the thymus where they mature and differentiate into the different types of T cells; cytotoxic, helper and regulatory. T-helper cells, also called CD4⁺ cells, are important in activating B-cells and T-cytotoxic cells in case of infection.
Crop is the part of the digestive
system you would see in a cross-section anterior to the gizzard. The crop is a
large dilation of the oesophagus and is located just outside the body cavity in
the neck region. The crop stores swallowed feed and water which are then moved
to the rest of the digestive tract while the gizzard is located after the
proventriculus behind the left lobe of the liver. The gizzard contains hard
objects that help in the disintegration of food.
Answer:
I believe that it is D.
Explanation:
If ice caps are melting, and polar bears use the ice flows to get their food, then the polar bears can't use the ice to get food. so, the polar bears most likely are expanding their diets to adapt to their surroundings. So, polar bears are probably moving off the sea ice and eating other foods.
Answer:
A gene codes for a particular protein that is involved in the expression of a trait.
Explanation:
Characteristics determined by single genes are called Mendelian traits.