Cell membranes of living systems are commonly made of a____________________.

Fill in the blank(s) with the appropriate word(s).


Lipid bilayer

Biology & Microbiology

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The ?1 protein produced by the yeast MAT?? allele functions:

A. alone to repress ?-specific genes in haploid ? cells. B. with Mcm1 protein to repress ?-specific genes in haploid ? cells. C. with ?2 protein to repress haploid-specific genes in diploid cells. D. with a1 protein to repress ?-specific genes in diploid cells.

Biology & Microbiology

The phylum ____ consists of about 200 known species of nonvascular plants that produce hornlike sporophytes, and

are the only land plants whose chloroplasts contain alga-like protein bodies called pyrenoids.

a. Hepatophyta b. Monilophyta c. Bryophyta d. Lycophyta e. Anthocerophyta

Biology & Microbiology

Which of the following flower parts develops into the pulp of a fleshy fruit?

A) stigma B) style C) ovule D) ovary

Biology & Microbiology

Gram-negative nitrogen-fixing bacteria found in association with plant roots are

A) alphaproteobacteria. B) betaproteobacteria. C) cyanobacteria. D) gammaproteobacteria. E) deeply branching bacteria.

Biology & Microbiology