Iam the vanishing gland. you need me most during your early childhood years and i begin to disappear when you reach puberty. i am considered a member of both the endocrine and the lymphatic system. i secrete a hormone, which to stimulate lymphoid cells to produce t-cells. you need me to fight off diseases. who am i?

Study the diagram of a desert food chain . what would most likely happen if the kangaroo rats were killed off and removed from the food chain ?

Gregor mendel is best known for his work with pea plants and for uncover many of the mysteries of genetics. one of his major findings stated that there were specific, physical units of inheritance that are transmitted during reproduction. what is the the name given to these units of inheritance which can be found on chromosomes? a) centromeres b) cytoplasm c) genes d) nucleotides

The diagram shows the development of the oocyte and the follicle during the menstrual cycle. identify at which stage in the cycle the hormone levels are at their highest and most active.