What are the ancestors of the rat

Algal cells are placed in an isotonic solution. Additional amounts of solutes are slowly added to the solution. What happens to the cells? A) They will begin to swell. B) They will burst. C) They will stay the same. D) They will shrink.

What does respiration mean? in biology?

True or false: In a gel electrophoresis gel, a DNA fragment containing 100 bp (base pairs) would travel faster (and further) than a strand of DNA containing 1000 bp.

The processes of transformation and transduction are important to which kingdom and why?

Explain the process of alluvial land formation and resulting soil formation?

Most of cellular respiration take place in what

An ocean trench forms when?

The fact that a strain of yeast with a certain defective gene can use the human version of the gene to repair itself is evidence that yeast and humans

What is the difference between a meteor and a meteorite? A meteor has more mass A meteorite reaches Earth and has not burned up A meteorite orbits the sun and a meteor does not A meteorite glows

Which of these was NOT characteristic of the first cells on Earth? A) anaerobic B) prokaryotic C) single-celled D) contained organelles