Which of the following did not occur during Precambrian time?
A. ancestors of all modern animals appeared
B. O2 accumulated in Earth's atmosphere
C. eukaryotes arose
D. photosynthesis evolved
E. life originated
A. ancestors of all modern animals appeared
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Conservation biology includes
a. a survey of biological diversity. b. maintaining biodiversity to benefit human populations. c. ecological considerations of diversity. d. an effort to maintain biodiversity. e. all of these
The ________ continually senses and adjusts our body systems to maintain homeostasis
Fill in the blank(s) with correct word
Which protist group does not have flagellated cells?
a. water molds b. brown algae c. golden algae d. euglenoids e. red algae
A crystal of potassium permanganate is placed into a beaker of water. The next day, the solid color is gone, but the water is evenly colored. This is an example of
What will be an ideal response?