Which of these cells of the dermal tissue of plants prevent water loss and control gas exchange?

o phloem cells

O companion cells

O parenchyma cells

guard cells

Kary Mullis, the developer of the polymerase chain reaction (PCR), said that he thought up the process while he let his mind wander during a drive.

Several experiments were required to demonstrate how traits are inherited. Which scientist or team of scientists first demonstrated that cells contain some components that can be transferred to a new population of cells and permanently cause changes

It is important to view cells under a microscope because cells can change true or false

Cyanobacteria are important bacteria due to their abilities to provide food for other organisms, fix nitrogen, and

While on the Galápagos Islands Darwin noticed that three were a number of species of finches that he theorized defended from a common ancestor he hypothesized that these finches became isolated on an island and adapted to fit an ecological role on

In peas, yellow color is dominant to green. What will be the colors of the offspring of the following crosses? a. homozygous yellow x green b. heterozygous yellow x green c. heterozygous yellow x homozygous yellow d.

Why do scientists believe that there used to be a single continent, and what was it called?

This type of membrane protein enables cells to catalyze specific chemical reactions at the inner or outer surface of their plasma membrane

Which of the following statements about genes and health is not true?

How is the DNA described and what does this mean?