In a pine tree, which of the following forms at fertilization?

a. a diploid zygote
b. a megaspore
c. a staminate cone
d. a pollen grain


a. a diploid zygote

Biology & Microbiology

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Deforestation in areas like Madagascar can significantly affect the water cycle. Why is this?

A. Less moisture is transpired into the atmosphere after deforestation. B. It is more difficult for soil nutrients to leach into streams after deforestation. C. The rate of evapotranspiration increases after deforestation. D. Cloud cover will increase after deforestation.

Biology & Microbiology

Which two parameters most influence the location of biomes?

A. altitude and latitude B. latitude and temperature C. temperature and precipitation D. precipitation and altitude E. precipitation and latitude

Biology & Microbiology

What kinds of bonds link the two strands of a double helix to each other?

A. hydrogen B. ionic C. hydrophobic D. covalent

Biology & Microbiology

Proteins separated on 2D gels provide information on their pH and size but not their identity. MALDI-mass spectrometry provides this missing information by which of the following?

A) generating sequence data for the protein B) generating a m/z ratio "fingerprint" for the protein C) generating a gene "fingerprint" for the protein D) generating a sequence "fingerprint" for the protein

Biology & Microbiology