What are the three main characteristics of fish?

A) eyes, tails, and a tracheal tubes
B) gills, fins, and scales
C) appendages, segmented body, and a brain
D) tentacles, foot tube, and gills


Ans: B) gills, fins, and scales

Biology & Microbiology

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By evaluating the genome sequences of ____________, it is possible to compare sequences of two closely related species and determine the original sequence probably present in the common ancestor

Fill in the blanks with correct word

Biology & Microbiology

If the peptidoglycan layer is between two plasma membranes in an organism, that organism is ____

a. Gram-negative b. an archaean c. Gram-positive d. chemoautotrophic e. eukaryotic

Biology & Microbiology

Males and females often differ in their reproductive strategies due to the fact that males can increase

the number of offspring they produce by ____ while females reproduce most successfully by ____.

a. mating with a high-quality female; mating with a high-quality male b. driving off other males; defending a productive territory c. defending a productive territory; enlisting multiple males to aid in raising her offspring d. mating with multiple females; mating with a high-quality male e. mating with multiple females; mating with multiple males

Biology & Microbiology

Although community composition changes during succession, diversity rarely changes

Indicate whether the statement is true or false

Biology & Microbiology