How is pyruvic acid used in the krebs cycle?

Does the machanical energy of an apple falling from a tree change

1) How has the classification of living things have changed over time? 2) Why is it nessasary for scientists to use a uniform system to classify all living things?

What is the problem agriculture is facing by the year 2050?

What is a factor that can stop normal cells from growing?

What is A mutagen is

What is the dependent variable? Also what is the Testing Variable.

Statistics about the climate in a tundra ecosystem were collected for 30 years. which hypothesis about a population of caribou could be made based on the climate data collected? a. caribou calf survival is directly related to annual rainfall amounts.

Since plant cells do not have centrioles, how do they make spindle fibers during mitosis?

Plants use sunlight to produce some ATP during photosynthesis. How do plants produce ATP when the Sun is not out? a. Plants are secondary consumers. b. Plants also use cellular respiration. c. Plants extract ATP from the stars. d.

Describe 4 ways that we know the global climate is changing