The source of the oxygen produced by photosynthesis has been identified through experiments using radioactive tracers. the oxygen comes from

A short definition of mutations

State the basic practises in crop improvement

You are an ecologist studying the life history of a newly discovered animal. You find that it reproduces slowly and has only one offspring each time it reproduces. What reproductive strategy does this organism use?

What do prokaryotes have in common with eukaryotes? A. They both have a Golgi apparatus. B. They both have mitochondria. C. They both have a nuclear membrane. D. They both have a liquid cytoplasm.

How do the onion molecules naturally come distributed throughout the room?

What is the main cause of extinction on Earth today? instantaneous speciation continental drift human impact on the environment natural disasters

Plants do not just use photosynthesis to make sugars for energy storage. Identify other kinds of uses plants have for these substances.

Phyllis is looking for food items high in omega-6 fatty acids. which item should be in her shopping cart?

What is one important way to control the spread of virsues

Which of the following is a way that human modification of limiting factors causes unbalance in ecosystems? a. habitat loss b. pollution c. climate changes d. all of the above