Most of the food and oxygen in the environment is produced by the action of

1. Saprophytic Bacteria

2. Heterotrophic Bacteria

3. Aerobic protozoans

4. Autotrophic organisms

How does the character of a rock influence weathering?

Aim on how does the dominant hand and non-dominant hand react to stimulus

Which is an example of a scientific hypothesis? 1 How will climate change affect forests and plants on dry land? 2 In horizontal rock layers, the oldest layer is at the bottom.

Which ions are found primarily in extracellular water? which ions are found primarily in intracellular water?

The eastern meadowlark and the western meadowlark are two bird species that look very similar to each other. Why do biologists not consider them the same species

Which organism's are omnivores? A) The snake, the bear, and the fish B) The fish and the eagle C) The bear and the fish D) The snake and the mouse If an omnivore is an animal that eats both plants and animals, I'd choose D because all the other

How are all humans similar?

Why does earth have such a diversity of plant and animal life? give three reasons.

After sequencing a molecule of dna, you discover that 20% of the bases are cytosine. what percentage of the bases would you expect to be thymine? explain why.

Kidneys that can conserve water are essential to homeostasis because: a) some animals live in dry or salty environments. b) some animals drink water.