Making mRNA from DNA is known as ____
a. translation
b. transcription
c. polymerase
d. replication
e. promoter
ANSWER: b
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The spines of a cactus and the insect traps of
carnivorous plants are modified leaves. Cacti spines and carnivorous plant insect traps are ______ structures.
a. analogous b. homologous c. recessive d. homozygous e. morphogenic
Four of the following statements about turtles are true. Which statement is false?
a. About 300 species of turtles currently exist. b. Turtles do not have teeth. c. Turtle shells are enlarged in marine forms. d. Turtles must return to land to lay eggs. e. Most sea turtle species are highly endangered.
The earliest life-forms were photosynthetic eukaryotes
Indicate whether the statement is true or false
The mode of natural selection in which extreme phenotypes are less fit than the optimal intermediate phenotype is?
A. Stabilizing selection B. Artificial selection C. Uniformitarianism D. Directional selection E. Disruptive selection