Which geological time period of Earth’s history is commonly referred to as the Coal Age?

a. Carboniferous
b. Cretaceous
c. Devonian
d. Jurassic
e. Permian


ANSWER: a

Biology & Microbiology

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Which connective tissue contains fibroblasts?

a. loose connective tissue b. fibrous connective tissue c. cartilage d. bone e. loose connective tissue and fibrous connective tissue

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What key adaptation distinguishes gymnosperms from ferns?

A. Gymnosperms produce pollen and do not require water to reproduce. B. Gymnosperms can produce flowers and fruits to aid in seed dispersal. C. Gymnosperms have a vascular system, which allows them to grow taller. D. Gymnosperms go through alternation of generations. E. Gymnosperms can grow larger gametophytes.

Biology & Microbiology

You have isolated two novel compounds, Compound X and Compound Y, which you suspect might be carcinogenic in some way. Based on their chemical characteristics, you hypothesize that Compound X is a cancer initiator and Compound Y is a cancer promoter

Design an experiment to test your hypothesis. What will be an ideal response?

Biology & Microbiology

Filtration methods, followed by growth of the bacteria trapped on the filters in growth media, are used to count bacteria present in very low concentrations, such as in lakes and streams

Indicate whether the statement is true or false

Biology & Microbiology