Plants and algae most recently shared a common ancestor 480 million years ago, and plants colonized land shortly after that. Light, water, minerals, and dissolved gases surround the whole body of a submerged green alga, and buoyancy of water provides physical support. What part did plants evolve to absorb water and minerals on dry land?

A. stomata
B. pollen
C. vascular tissues
D. cuticle
E. lignin


Ans: C. vascular tissues

Biology & Microbiology

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Natural selection results in organisms perfectly adapted to their environments

Indicate whether the statement is true or false.

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In the accompanying diagram, ____ is labeled "C"

a. the appendix b. the cecum c. a polyp d. a portion of the small intestine e. the colon

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Which of the following animals do not have a four-chambered heart with two separate pumping systems?

A. hummingbirds B. lizards C. cats D. crocodiles E. elephants

Biology & Microbiology

BSE or 'Mad Cow Disease' are probably caused by Prions. Prions may be classified as:

A. Protozoa B. Viruses C. Genetic material particles (DNA) D. Bacteria E. Proteinaceous material

Biology & Microbiology