Recent evidence suggests that the early fossils of Homo erectus may actually represent two species,
one being Homo erectus and the other species being:a.
Homo sapiens.
b. Homo africanus.
c. Homo ergaster.
d. Homo habilis.
e. Homo heidelbergensis
C
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Four of the four answers listed below are types
of complex plant tissue. Select the EXCEPTION.
a. sclerenchyma b. phloem c. xylem d. epidermis e. periderm
In the above diagram, C represents which of
the following structures?
a. large diameter blood vessel b. capillary beds c. the zone of diffusion of gases and nutrients d. the heart e. large diameter blood vessel and the zone of diffusion of gases and nutrients
Scientists believe that mitochondria may have evolved from bacteria because
a. they both have cristae membranes. b. mitochondria have their own DNA. c. the shapes and sizes are exactly the same. d. both are surrounded by a cell wall. e. both can live independently
Which of the following is a true statement regarding lysosomes?
A) The lysosome may mature from a late endosome. B) The lysosome may function in glycosylation. C) The contents of the lysosome originate in the smooth ER. D) The lysosome functions in export packaging. E) None of these are correct.