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

Biology & Microbiology

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Oxytocin is secreted by the posterior pituitary in females only

Indicate whether the statement is true or false.

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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.

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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.

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From which part of a eukaryotic cell do microtubules radiate?

a. Flagellum b. Nucleus c. Centrosome d. Mitochondrion

Biology & Microbiology