Vascular plants appeared about 450 million year ago. Vascular plants have existed on earth for ________.

A. 75% of its history
B. 10% of its history
C. 50% of its history
D. 90% of its history
E. 20% of its history


Answer: B

Biology & Microbiology

You might also like to view...

A continual source of genetic variation in populations is ________, which changes one allele into another.

A) mutation B) migration C) random mating D) natural selection

Biology & Microbiology

Members of the __________ move via pseudopodia

a. amoebozoa b. rhizaria c. archaeplastids d. excavates e. chromalveolates

Biology & Microbiology

In a single family, the parents have brown eyes but all five of their children have green eyes. This is an example of evolution

Indicate whether the statement is true or false

Biology & Microbiology

Which situation represents an example of territorial behavior?

A) Digger wasps are able to recognize the pattern of landmarks around their nests. B) Sow bugs become more active and move around randomly if they find themselves in a dry area. C) Gannets breed in dense colonies. Each gannet defends the area within the beak's reach of its nest, but gannets feeding at sea are indifferent to each other. D) Troops of monkey species use well-defined, widely overlapping ranges. Troops avoid encountering each other and are aggressive if they meet.

Biology & Microbiology