Of all the species that have ever lived on planet earth, what percentage are now extinct?

none

10%

50%

90%

Insecticidal soaps are potassium salts of fatty acids that work on insects by breaking down the waterproofing covering on the insect's bodies causing them to dehydrate. a. True b. False

In prokaryotic and eukaryotic cells the amount of water in the cell is kept at a steady state. The organelles through which water passes into and out of cell is the A) cell membrane B) cell wall C) nucleus D) ribosome

8. Which two types of biomolecules are directly affected by a mutation? A. nucleic acids and lipids B. nucleic acids and carbohydrates C. proteins and nucleic acids D. proteins and carbohydrates

Does homeostasis occur in viruses?

Which is a compound? calcium air iodine water

The reproductive structures used by cycads are called? a. flowers. b. sporangia. c. sori. d. cones.

What moves across the earth and breaks down rocks

1. If erythrocytes (RBCs) are incubated in the distilled water (pure water), what will happen to the cell volume of the RBC? Increases, decreases, or remains the same?

What is the difference between meiosis I and meiosis II

Which of the following is a mobile body type of cnidarians? 1. Coelom 2. Polyp 3. Medusa 4. All Of The Above