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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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
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