Answer the following questions true (T) or false (F)
1. A relatively early hominin with advanced tool technology was Homo ergaster.
2. The brain of Australopithecus afarensis was almost the same size as that of modern humans.
3. Australopithecus afarensis represents a hominin with both ape-like and human-like characteristics.
1. TRUE
2. FALSE
3. TRUE
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Oxytocin is secreted by the posterior pituitary in females only
Indicate whether the statement is true or false.
Over tropical rainforest areas, approximately 90% of the water that reaches the atmosphere comes from
A. animal metabolism. B. animal perspiration. C. plant transpiration. D. plant absorption. E. plant metabolism.
Which statement best describes the relationship between an antibody and an antigen?
a. An antibody is specifically produced in response to an antigen. b. An antibody is produced by T cells and an antigen is a foreign protein. c. An antigen is presented by antigen presenting cells to plasma cells, which produce antibodies. d. An antigen is a disease-causing organism, and antibodies are produced by B cells. e. An antibody generally induces antigen formation.
From which part of a eukaryotic cell do microtubules radiate?
a. Flagellum b. Nucleus c. Centrosome d. Mitochondrion