Which of the following ideas was most commonly held in the eighteenth century?
A. the fixity of species
B. genetic change through mutation
C. changes in a species through adaptation to the environment
D. evolution by natural selection over time
Answer: A
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You have type O blood (genotype ii). Who can you donate blood to in an emergency?
a. type O only b. type B only c. type A only d. type AB only e. types A, B, AB, and O
How are giant kelp and sea grass alike?
a. both contain chlorophyll a b. both utilize gas-filled spaces for buoyancy c. both lack conductive tissues and rely on diffusion to transport molecules manufactured by photosynthesis d. both a and b e. both b and c
Spawning animals rely on mating behaviors, chemical signals, and/or environmental cues for reproduction to take place
Indicate whether the statement is true or false
The part of the Drosophila zygote with high bicoid concentration will
A. become the anterior region of the embryo B. become the region of the embryo that has a spiracle C. become the tail region of the embryo D. become the segment that will have wings E. become the segments that will have legs