Which of the following statements does not describe the structure of an atom? The electron cloud is a small and compacted space around the nucleus. Inside the nucleus of an atom are protons and neutrons. Protons are positively charged sub-atomic particles. Electrons are negatively charged sub-atomic particles.

The hypothesis of continental drift states that earth's continents, which are located on tectonic plates, move relative to each other. which of the following is true of the movement of the tectonic plates? a. tectonic plates only move once every million years. b. they move at a rate of approximately 5 centimeters per year. c. tectonic plates never move, only the continents located on them do. d. their movements are very rapid and occur at random times.

Drag each tile to the correct box. arrange the phases of mitosis in the correct order. 1 (condensation of chromosomes) 2 (separation of chromosomes) 3 (formation of spindle fibers) 4 (alignment of chromosomes in the center of the cell) 5 (pinching of the cell membrane)

Which of these substances does not protect against invaders in the nonspecific immune response? a. saliva b. mucus c. tears d. urine