Which organelle is not found in both plant and animal cells?

A) nucleus
B) peroxisome
C) mitochondrion
D) smooth endoplasmic reticulum
E) central vacuole


E) central vacuole

Biology & Microbiology

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Indicate the cell types that are most likely involved in tissue rejection.

A. Cytotoxic T cells B. Macrophages C. T helper cells D. B cells E. Neutrophils

Biology & Microbiology

Independent assortment predicts a 9:3:3:1 ratio with four different phenotypes in the F2 progeny. If the alleles are epistatic, what would you predict?

A) more than four phenotypes B) fewer than four phenotypes C) heterozygotes with a novel phenotype between the dominant and recessive homozygotes D) 1/3 of the progeny with the dominant phenotypes and 2/3 recessive E) no change in the 9:3:3:1 ratio

Biology & Microbiology

Compare the composition, structure, and function of cilia and flagella

What will be an ideal response?

Biology & Microbiology

The growing center that gives rise to outer layers of bark on both root and shoots is the

A. apical meristem. B. cork cambium. C. lateral meristem. D. vascular cambium.

Biology & Microbiology