What is the function of a fish's operculum?
A) Detects biofields in the immediate vicinity
B) Detects movements in the surrounding water
C) Protects the gills
D) Provides buoyancy
C
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This seed structure's purpose is to nourish the
young plant until its leaves can begin photosynthesis.
a. plumule b. hypocotyl c. radicle d. cotyledon e. coleoptile
Transgenic animals made by pronuclear injection can be limited for studies of the links between genes and disease because
A) the transgene allele must be dominant to the normal, endogenous allele and some diseases are caused by recessive mutations. B) the transgene allele must be recessive to the normal, endogenous allele and some diseases are caused by dominant mutations. C) all diseases are caused by mutations in multiple genes. D) diseases are not caused by specific alleles of a gene, but by posttranslational modifications of proteins.
The diverse topography of mountainous regions generally supports more species of plants and animals than the consistent terrain of flatlands
Indicate whether the statement is true or false
How have ocean waters been affected by increased amounts of carbon dioxide in the atmosphere?
A) more acidic B) more basic C) closer to neutral in pH D) richer in aquatic species