Riddle: I'm mostly made of water, but that's not all. I fill up the cell, from wall to wall.

The carbon dioxide absorbed by plants is returned to the atmosphere when:

Which of the following is anther term for eruptions of gas on the suns surface a. nuclear fusion b. sunspots c. coronas d. solar flares

How many covalent bonds can nitrogen have? a. 0 c. 2 b. 1 d. 3

What is sugar ribsoe

What can wind and water erode? I can do math ... but I'm terrible with science ... oof

Which of these substances could be driven across a membrane by the resting membrane potential?

Norway rats have 42 chromosomes in their diploid cells. If a diploid rat cell enters meiosis, how many chromosomes and double-helical molecules of DNA will be present in each daughter cell at the end of meiosis II?

Which discovery is attributed to Phoebus Levene? A. extraction and observation of DNA B. identification of ribose and deoxyribose C. recognition of RNA as DNA's messenger D. construction of an accurate DNA model

A small population of chimpanzees lives in a habitat that undergoes no changes for a long period. how will genetic drift probably affect this population?

Which type of cells can differentiate into many different types of cells? select all that apply