Answer:
B. Endophytes that produce toxins can be poisonous to grazing animals.
The interior of the small intestine are tightly wrinkled into projections called circular folds that greatly increase their surface area
Animal Circulatory Systems An efficient circulatory system has: a fluid, e.g., blood, to carry the materials to be transported; a system of vessels to distribute the blood; a pump to push the blood through the system; exchange organs to carry out exchanges between the blood and external environment, e.g., lungs and intestine to add materials to the blood; lungs and kidneys to remove materials from the blood. The most crucial demand on the circulatory system is the transport of oxygen and carbon dioxide to and from a gas exchange organ: lungs or gills and the tissues. All exchanges between blood and cells occur in the capillaries. The force of the pump that pushes blood through the arteries is dissipated as the blood flows through capillaries.
The region of the chromosomes to which the spindle fiber is attached during cell division...both mitosis and meiosis. Its the constricted point at which 2 chromatids forming the chromosomes are joined together
