What do the large female cones of a pine tree contain?

a. pollen
b. antheridia
c. microspores
d. megasporangia
e. microsporangia


d

Biology & Microbiology

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The intentional release of a natural enemy to attack a pest population is called ________

A) biological control B) coevolution C) sustainable resource management D) integrated pest management

Biology & Microbiology

To determine the effects of caffeine on memory formation, Professor Mulligan gives one group of students a cup of caffeinated coffee and a separate group of students a cup of decaffeinated coffee. Thirty minutes later, he administers a memory formation task to both groups. The coffee in this experiment (both caffeinated and decaffeinated) represents the ________ .

a. control group b. independent variable c. experimental group d. dependent variable e. confounding variable

Biology & Microbiology

Are all of the mitochondrial proteins encoded by mitochondrial DNA?

What will be an ideal response?

Biology & Microbiology

Animals capable of producing their own body heat by way of metabolism and of retaining it are said to be

A. endothermic. B. metabolic. C. thermodynamic. D. thermogenic.

Biology & Microbiology