When do scientists believe life originated on Earth?

A.

3 to 4 billion years ago

B.

600 million years ago

C.

less than 6,000 years ago

D.

over 5 billion years ago

Glycolysis with one molecule of glucose a. requires oxygen b. produces 3 ATP molecule c. produces 4 molecule of NAD+ d. may occur under aerobic or anaerobic conditions e. produces one molecule of pyruvate which one is the answer

Which of the following structures is not part of the central nervous system? A. The brain B. A nerve C. The spinal cord D. A tract

Which of the following best deacribes the process of meiosis

Bleeding disorders can result from the lack of O vitamin B12 O vitamin D O vitamin A vitamin K O vitamin C

When the total lunar eclipse occurs what are the relative positions of the sun earth and moon

What does lipase digest? A. Carbohydrates B. Proteins C. Fats

1. Any molecule that contains carbon to hydrogen bonding is known as a A) water B) inorganic molecule C) organic molecule 2. How many valance electrons are generally needed to fill the outer shell of most atoms? A) 4 B) 6 C) 8 3.

Benefits of using coal oil and natutal gas

An ionic bond is most likely to form between: a) a negatively and a positively charged ion. c) two uncharged atoms. b) two positively charged ions. d) two negatively charged ions.

According to conflict theories, who benefits from family structures where women stay home and men work for pay?