If the GC content of two organisms is 45% in both,
A. they are definitely related.
B. they are definitely not related.
C. they may or may not be related.
D. the AT content is 65%.
E. they are definitely related AND the AT content is 65%.
C
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The formation of _____ depends on gene action, interactions within the embryo, interaction with other embryos that may be in the uterus, and interactions with the maternal environment
Fill in the blank(s) with correct word
The Golgi apparatus is not
A. involved with secretion of cellular substances. B. an organelle. C. studded with ribosomes. D. a processing center. E. a stack of membrane-enclosed sacs.
What is the ultimate source of genetic variation within a population?
a. Mutations in DNA b. Adaptation of a species to environmental changes c. A sensory system that can detect an environmental change d. Homeostatic mechanisms that compensate for environmental changes e. A system of locomotion that allows an organism to escape environmental changes
Abiotic factors are ________
A) living components of an ecosystem B) nonliving components of an ecosystem C) living and nonliving components of an ecosystem D) None of the above