What factor primarily determines the time of year that a plant flowers? A. Availability of water B. Number of nearby plants C. Daily hours of darkness D. Amount of nutrients

The sarcolemma is (the) endoplasmic reticulum of skeletal muscle fibers. cytoplasm of skeletal muscle fibers. cell membrane of skeletal muscle fibers. extension of the skeletal muscle cell membrane into the cell. none of the above.

Plant and animal cells can A) make ATP. B) make starch. C) make chitin. D) make cellulose.

In a deciduous forest ecosystem, which of these organisms would be a decomposer? A) algae B) lichen C) mushroom D) oak tree

Mr. Johnson is giving a lesson on enzymes in his freshman biology class. Mr. Johnson displays six beakers with either a chemical substrate or chemical enzyme in them.

and other microbes can be used to "clean up" an oil spill by breaking down oil into carbon dioxide and water. Two samples isolated from the Deepwater Horizon leak in the Gulf of Mexico were labeled A and B.

What did frederick griffith want to learn about bacteria?

Which type of chromosome alteration results in the formation of a tetravalent (cross-like) structure at synapsis?

When place in water eggs will float with the light side down. What is the advantage of this?

How is a warm front different from a cold front? Warm fronts cause snow flurries in the winter, while cold fronts cause several days of rainy weather. Warm fronts cause rapid changes in weather, while cold fronts cause several days of cloudy weather.

Why do large winds circle earth