How many people are on planet earth

Why is sandstone not a mineral?

Plants show turgor pressure when cells are losing water from their water vacuoles. cells contain water vacuoles that are full of water. water is being used up in photosynthesis. water is being evaporated from the leaves.

A general function of all cellular membranes is to regulate which materials can enter or leave the cell. move the cell. produce proteins for the cell. support the cell and determine its shape. produce energy for the cell.

Corals feed on eachother true or false

A gene for microtubule proteins is being made in a cell. How can mRNA represent an exact copy of that gene?

An element's atomic number is 49. How many electrons would an atom of this element have?

Which is the ability of a cell membrane to allow materials to pass through it called

The brain and spinal cord are formed from a. the notochord, which forms from endoderm b. the neural tube, which forms from mesoderm c. the neural tube, which forms from ectoderm d. the notochord, which forms from mesoderm

Missy spencer was given penicillin for tonsillitis. she developed a severe life-threatening allergic (hypersensitivity) reaction to the penicillin. her medical file records this reaction as a (n) :

What situation most likely explains the occasional high frequency of certain inherited disorders among human populations established by a small population?