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
You might also like to view...
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
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.
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?
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