All cells in an embryo have the same genes, but they express different subsets of this genome. Selective gene expression is the basis of:

a. cleavage
b. cell differentiation
c. fertilization
d. gamete formation
e. organ maturation


b

Biology & Microbiology

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The terms algae and protozoa have significant phylogenetic meaning

A. true B. false

Biology & Microbiology

The ____ of marine mammals receives normal blood supply during deep dives

a. lungs b. heart c. brain d. blood vessels e. heart, brain, and blood vessels

Biology & Microbiology

Which of these features is found in both nonvascular and vascular plants?

a. lignin b. roots c. cuticle d. xylem e. phloem

Biology & Microbiology

The term "karyotype" describes

a) A individual who is carrying a particular allele b) An assessment of the appearance and number of chromosomes in a nucleus c) An epidemiological study of how genetic traits are passed through generations d) The phenotype that arises from having a specific cancer-related gene mutation

Biology & Microbiology