Australopithecus garhi lived about ________ million years ago.
A) 1.0
B) 2.5
C) 4.0
D) 5.0
B) 2.5
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Answer the following statements true (T) or false (F)
1. The cell is the basic structural/functional unit common to all living organisms. 2. Resolution, contrast, and magnification are three important parameters in microscopy. 3. Fluorescence microscopy enables researchers to label and visualize a particular type of cellular protein or organelle. 4. The flagellum is used for cell motility in eukaryotes only.
Three plants that share the same niche have taproots of different length. This is an example of ____
a. character displacement b. the competitive exclusion principle c. resource partitioning d. allopatric speciation e. sympatric speciation
Cell shape is reinforced by ____
a. phospholipids
b. DNA c. cytoskeletal filaments d. transport proteins e. ribosomes
The discharge of blood during the human female's period indicates that the
A. egg is being released from the ovary. B. lining of the uterus is being shed. C. ovarian follicles have developed into the corpus luteum. D. corpus luteum has developed into the ovarian follicle.