In plants, sexual reproduction occurs when sperm and egg unite into form a

This is the energy needed to drive photosynthesis.

Explain why scientists think that life on earth began after 3.9 bya

For aerobic cellular respiration to take place, cells need oxygen. What is the source for this oxygen? the breakdown of glucose the air the breakdown of carbon dioxide the water

Suppose you perform a serial dilution of Amylase from a stock solution with a concentration of 500ug/mL. In five tests tubes you add 4mL of water. Then you aliquot 1mL of the stock solution into test tube 1 and vortex.

Which of the following properties is not used to define a mineral? Question 1 options: Its crystal structure Its chemical composition Its state of matter (solid, liquid, gas) Its color

All of the gray squirrels and red squirrels that inhabit an oak forest describes a / an

True or false: to get more whole grains in your diet, add a whole grain food such as oatmeal or brown rice to your regular diet.

Which of the following statements is not true about absorbency use to soak up different leagues and

DNA replication results in: Group of answer choices 2 DNA molecules that each contain a strand of the original 1 new molecule of RNA 1 new DNA molecule, 1 old molecule is conserved 2 completely new DNA molecules

5. Which is the first step of the scientific method?