The exoskeleton of arthropods is composed of chitin

____________________ Indicate whether the statement is true or false.


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Biology & Microbiology

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Cross-sectional surveys are very useful in establishing cause of a disease

Indicate whether this statement is true or false.

Biology & Microbiology

Is it possible to be a "carrier" (phenotypically normal but capable of passing the allele to one's offspring) for a genetic disease exhibiting this type of inheritance?

a. Yes b. No

Biology & Microbiology

Four of the following statements about crocodilians are true. Which statement is false?

a. They live in or near water. b. They are predators with sharp teeth. c. They have a two-chambered heart. d. They have powerful jaws. e. They are the closest living relatives to birds.

Biology & Microbiology

Which of the following are NOT structures by which viruses adhere to their host cells?

a. Capsule b. Spikes c. Fimbriae d. Slime layer

Biology & Microbiology