Failure to reach equilibrium with a disease agent could result in extinction for a host species
Indicate whether the statement is true or false.
Answer: TRUE
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Which of the following represents a potential threat to biodiversity?
(a). People construct artificial reefs to support marine life. (b). Humans clear land for agriculture and housing. (c). Energy flows through an ecosystem, with much lost as heat. (d). Tropical rain forests and coral reefs are found where solar energy is the most abundant. (e). In a food chain, one population feeds on another.
The components of vertebrate blood include
A. plasma. B. leukocytes. C. erythrocytes. D. platelets. E. All of the choices for this question are correct.
During the stage called neurulation, a flexible rod called a ________ forms along the midline of the dorsal surface of the embryo.
A. neural groove B. notochord C. somite D. dorsal nerve cord
Genetic change due to the migration of fertile individuals or gametes between populations is
a. gene flow b. bottleneck c. genetic drift d. mutations e. microevolution