What are some geographical features of the Amazon Rainforest and how have they changed?

I retract my original question, so instead; Which of the following scientists did NOT contribute to the idea of natural selection? A) Charles Darwin B) Alfred Russel Wallace C) both a and b D) none of the above

If the sperm cell that fertilizes an egg has a (n) chromosome, it will form female offspring

Which of the following is true about protein molecules? A. The shape and folded structure of a protein molecule are important in determining its function. B. Protein molecules are made up of strands of DNA joined together by amino acid sequences. C.

Which statement best describes cellular respiration? A) It occurs in animal cells but not in plant cells B) It converts energy in food into a more usable form C) It uses carbon dioxide and produces oxygen D) It stores energy in food molecules

What is the groove of an enzyme that holds the substrate

Earth rotates around the sun. true false

When scientists first started mapping human genes, they estimated that there were about 2 million genes. By the late 1990s, it was thought that there were only 100,000 genes, and then that number shrank to 19,000 in 2001.

Which statement best describes how light travels? Light, in a vacuum, travels at the same speed even if the light source is moving. Light given off from a moving source will travel faster in a vacuum.

How are fished adapted to their environment?

You are conducting an experiment with phosphorus and nitrogen being added to the soil of a growing plant. When the amount of added nitrogen is increased, the growth is not affected.