Scientists have found that ancient fossils
a. are very similar to present-day organisms.
b. are more similar to present-day organisms than more recent fossils.
c. are just as similar to present-day organisms as more recent fossils.
d. are less similar to present-day organisms than more recent fossils.
e. bear no resemblance to present-day organisms.
D
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Stomatal pores function to allow which of the following?
A. loss of water vapor from leaves B. entry of CO2 into leaves C. prevention of water loss from leaves D. escape of O2 from leaves E. All of the choices are correct
What protein influences the ability of RNA polymerase to transcribe genes?
A. DNA polymerases B. DNA helicases C. transcription factors D. snRNPs E. tRNA
Which group of fish has fleshy body extensions that support the bones in their pelvic and pectoral fins, enabling them to "walk" on the bottom of the ocean?
a. Hagfish b. Lampreys c. Cartilaginous fish d. Bony fish e. Ray-finned fish
The location where an axon terminal of one neuron comes into close proximity with a dendrite or cell body of a second neuron is called a(n) ___________
Fill in the blank(s) with the appropriate word(s)