This lymph organ is responsible for producing red and white blood cells and platelets. 

A. thymus
B. red bone marrow
C. spleen
D. lymph nodes


B. red bone marrow

Biology & Microbiology

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The chemical reactions of photosynthesis occur in which cellular organelle?

A. Mitochondria B. Chloroplasts C. Ribosomes D. Nucleus

Biology & Microbiology

Haploinsufficiency ____

a. produces Barr bodies

b. results from elevated gene dosage c. occurs when a diploid organism has only one functional copy of a gene d. occurs due to gene duplication e. refers to the loss of a whole set of chromosomes

Biology & Microbiology

Conifers are characterized by all of the

following EXCEPT a. thick cuticles. b. intolerance to warm climates. c. needle-shaped leaves. d. recessed stomata. e. adaptations for conserving water

Biology & Microbiology

Most domesticated food crops come from which of the following plant groups?

A) mosses B) gymnosperms C) ferns D) angiosperms

Biology & Microbiology