Approximately, when did the cultivation of plants begin?

A) 11,000 years ago

B) 110,000 years ago

C) 1,100 years ago

D) 55,000 years ago

How does a gymnosperm prevent itself from pollinating the same tree

Difference between jellyfish and Starfish

Lymph fluid is the intermediary between the blood in the capillaries and the

What is a pigment cells that change the color of an organism, allowing it to camouflage?

When two species exhibit different behaviors but live in the same area, what can result? A. Founder effect B. Behavioral isolation C. Geographic isolation D. Temporal isolation

The maxinmum numbers of individuals of a particular species that a partiticlar environment can support is its

What is the layer of the atmosphere 20 km above Earth's surface

An experiment was conducted to determine which type of fruit attracts the most fruit flies. Equal sized pieces of apple, pear, and banana were placed in separate containers at different areas around the school.

In the F2 generation of Mendel's crosses, A. all plants had the dominant trait. B. half of the plants had the dominant alleleC. all plants had both the dominant and recessive alleles. D. one in four plants had two alleles for the recessive trait.

In a population, when the birthrate becomes higher than the death rate, the population's growth rate A) decreases. B) increases. C) slows to a stop. Eliminate D) levels off and remains constant.