Between which members of the chordate lineage do vertebrates arise?
1.between lungfishes and amphibians
2.between hagfishes and lampreys
3.just after the tunicates
4.between birds and mammals
2
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Which of the following situations will lead to natural selection?
a. The seeds of two plants land near each other and grow to similar sizes. b. Two types of fish eat the same kind of food have the same number of offspring. c. Male lions compete for the right to mate with females, with only one possible winner. d. A drought in an agricultural area leads to a loss of different types of crops and plants.
after anaerobic exercise, lactic acid is converted to pyruvic acid, which enters the _________ pathway and can be used for energy
Fill in the blank(s) with the appropriate word(s).
The first shell in any atom contains one orbital which may contain as many as:
A. 8 protons B. 4 neutrons C. 8 electrons D. 2 neutrons E. 2 electrons
Most of the water moving through a plant is lost through ____.
A. osmotic gradients in the soil B. transpiration C. translocation D. photolysis E. photosynthesis