Which of the following structures can perform all the activities required for life?

A) DNA molecules
B) cells
C) organelles
D) nuclei


B

Biology & Microbiology

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What character state distinguishes Cnidarians from Bilaterians in the phylogenetic tree in Figure 35.2?

A. presence or absence of ganglia B. presence or absence of sensory neurons C. presence or absence of interneurons D. presence or absence of motor neurons

Biology & Microbiology

The human immunodeficiency virus (HIV) primarily destroys which cells?

a. B b. neutrophils c. T1 d. helper T and macrophages e. suppressor T

Biology & Microbiology

Which bacteria could be responsible for Hemolytic Uremic Syndrome (HUS)?

What will be an ideal response?

Biology & Microbiology

Which of the following is least likely to be a cause of extinction?

A. Asteroid impact B. Human activity C. Adaptive radiation D. Continental drift E. Climate change

Biology & Microbiology