Marine reptiles and birds deal with large concentrations of salts in their body by:
a. having very fast metabolisms
b. having excretory salt glands.
c. having very efficient kidneys.
d. secreting salt through their feathers.
b
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Peroxisomes are examples of:
A. microbodies. B. ribosomes. C. chromosomes. D. nucleosomes. E. lysosomes.
A flower with carpels and stamens but no petals or sepals is ____
a. perfect and incomplete b. imperfect and complete c. imperfect and incomplete d. perfect and complete e. sterile
An individual's ____ determines its observable ____
a. phenotype; genotype b. genotype; phenotype c. gene location; allele d. heterozygote; homozygote e. homozygote; heterozygote
Fibroblast cells are a good model system for studying muscle differentiation because
A. they are totipotent. B. they never differentiate into muscle cells in a normally developing animal. C. they have a small genome. D. they can differentiate into muscle cells in a normally developing animal. E. they express a limited number of genes.