Why using two manipuled variables in an expierement would be wise

While hiking after school one day, you came across several plants that you weren't familiar with. You took a leaf sample from each, and went back to the lab and did a stomata density count. Using a 40x objective with a field diameter of 0.

What would most likely happen to the carbon cycle if there were no more plants on Earth? Animals would consume more carbon. More carbon would be released from fossil fuels. Carbon would build up in the atmosphere.

Which stage uses the reactant water from the overall photosynthesis equation? Which stage produces sugar?

All axis on a graph run horizontally.

Methane hydrates in the ocean are a significant source of methane

Marks: 1 the circulatory movement that occurs in a gas or fluid with areas of differing temperatures due to the variation of the density and the action of gravity is called:

there is 30 percent more what in earth's atmosphere today than there was before the start of the industrial revolution

Scientists say that conditions must be "just right" for a hurricane to start up. Which is the first step of "just right" in the development of a hurricane? A) Cool ocean water replaces warmer surface water.

What is another name for a tropical savanna?

What is a substance in plant sources that cannot be digested that is 5 letters