The dermal endoskeleton of echinoderms is made of

a. cartilage.
b. bone.
c. calcium carbonate.
d. chitin.


a

Biology & Microbiology

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Compared to Eukaryotes, Bacteria and Archaea have ________ surface-to-volume ratios, causing ________ nutrient exchange and growth rates

A) lower / lower B) lower / higher C) higher / lower D) higher / higher

Biology & Microbiology

Which of the following are found in BOTH

plant and animal cells?

a. nucleus, Golgi body, and chloroplasts b. Golgi bodies, mitochondria, and endoplasmic reticula c. centrioles, cell wall, and nucleolus d. vacuoles, nucleolus, and lysosomes e. starch grains, chloroplasts, and lysosomes

Biology & Microbiology

About half of human fertilized eggs have a lethal condition called ____

a. polyploidy b. aneuploidy c. translocation syndrome d. nondisjunction e. euploidy

Biology & Microbiology

The thalamus is on the receiving end for all sensory input except for

A. sense of hearing. B. sense of smell. C. somatosensory information. D. visual sense. E. memory and emotions.

Biology & Microbiology