What are two examples of environmental events that have caused mass extinctions?

2. A new moon occurs once every 29.5 days. Why must the Sun, Earth, and the Moon be aligned in order for the new moon to occur?

7. Chemotherapy uses drugs that spread throughout the entire body because they do not affect healthy cells. True False

A cold-tolerant and salt-tolerant type of crab would likely be found in which part of the ocean? question 13 options:

Which of the following is a place where both dna and ribosomes are unlikely to be found in any type of cell

Opening of a flatworm used for collection of food and expulsion of waste

In what way are plants in a sunny meadow and sulfur bacteria in a deep sea vent alike A) They both use photosynthesis to make their own food B) They both produce carbohydrates C) They both use chemosynthesis to produce their own food D) They both

Maryland white oak trees make their own food. Their cells contain structures that capture energy from the sun. What are these structures?

What are two ways in which all living things are similar at the molecular level.

Which of the labeled structures controls the water balance in the paramecium?

Paleontologists can definitively conclude whether dinosaurs were endotherms. a. True b. False