Ozone in the ________ comprises a thin layer that protects the surface of Earth from ultraviolet radiation

Fill in the blank(s) with correct word


stratosphere

Biology & Microbiology

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The biosphere

a. is located in the Northern Hemisphere. b. contains organisms with similar needs. c. has environmental conditions of similar temperature, pressure, and salinity. d. supports all of life on earth. e. is restricted to the continents.

Biology & Microbiology

Now extinct, several lineages of ____ appear in the fossil record from the Ordovician through the

Devonian periods. These jawless fishes had skin heavily armored with bony plates and scales, and imprints of some of their fossils indicate that their brains had three regions.

a. acanthodians b. conodonts c. osteolepiforms d. placoderms e. ostracoderms

Biology & Microbiology

Deletions are most useful for gene mapping

A) when you have a mutant allele of a gene that is recessive to normal alleles and amorphic. B) when you have a mutant allele of a gene that is dominant to wild-type alleles. C) if you have a mutant allele of a gene that results in no detectable mutant phenotype when homozygous. D) if you have a gain-of-function mutant allele of a gene.

Biology & Microbiology

A solution is a uniform mixture in which a ____ is dissolved completely in a ____

a. salt; solute b. solute; salt c. solute; solvent d. solvent; salt e. solvent; solute

Biology & Microbiology