Given the general chemical formula X2O, to what group in the periodic table does the Period 2 element represented by X belong?

A. 1

B. 16

C. 2

D. 17

Why do plants lack mobile phagocytic cells?

What is the name of the 3 disease causing microorganisms? (This is how the question is wrote on my homework and it doesn't make sense to me, sorry.)

Which vessels allow diffusion of oxygen and nutrients across their cell layers?

Which of the below is a behavioral adaptation in camels? A: Large hump to store food and water for long periods of time. B: Long eyelashes to block sand from entering the eyes. C: Nostrils that can open and close to block debris from entering them.

What process will be completed instead of cellular respiration when oxygen is not readily available to your cells

What do a door and a venus flytrap leaf have in common

Where would be the best place to find an alpine glacier A) Antarctica B) Greenland C) the Himalayas D) the North Pole

The Sun is A. a very small star. B. a medium-sized star. C. the largest star in the universe. D. the same size as all the other stars.

6. The blood component that has the greatest affinity for oxygen is the a) Lymphocyte" (b) Leucocytes (c) Erythrocytes (d) Thrombocyte

According to the endosymbiosis theory scientist believe early eukaryotes form from prokaryotes why do scientist believe that prokaryotes existed earlier eukaryotes