Which is an abiotic factor that affects a freshwater ecosystem?

A. The number of fish

B. The competition for food

C. The amount of light

D. The number of predators

How does pollen get to the stigma

Can a mutation be beneficial to an organism

I had the privilege of visiting mt. st. helens in the late 1990s. one of the things i noticed was that very few plants were growing in the blast zone due to the scarcity of certain essential elements.

What are the common characteristics of authoritarian rule in Africa? Be sure to list at least 5 examples.

Match the following parts of a flower with their descriptions. 1. pistil connects the stem to the flower 2. stamen 5 the most colorful parts of the flower 3. sepal 1 divided into three parts: stigma, ovary, and style 4.

Which of the following distinguishes cellulose from starch

Which numbers identify the organelles that are present in BOTH plant and animal cells? A) 1, 2, 6 B) 1, 5, 4 C) 1, 6, 5 D) 1, 5, 2

What is directly responsible for an acquired trait

Which statement best describes a physical change? Changes can occur to certain chemical properties of the substance, but the overall shape of the substance will remain the same.

What are catalysts that speed up reactions in living things called? A. Biocatalysts B. Enzymes C. Cellular facilitators D. Polymers