An electron microscope would be used if

a sample needed to appear lighter

O a sample was too small to be seen with an optical mic

details of cell structures needed to be distinguished

What property is shared by many gemstones, such as diamonds, rubies, sapphires, emeralds, and topaz?

Which of the following is not a way in which cells maintain homeostasis? A They take in water and release waste. B. They respond to stimuli in their environment. c. They allow water to build up within their membranes D.

What does it mean when we say the genetic code is redundant?

Bacteria can be genetically engineered to produce a foreign protein. This is accomplished through a process that inserts the gene for the protein into the genome of the bacteria.

If Tyler does not eat a diet that includes essential amino acids, his cells will not be able to build

A sedimentary rock containing a fern fossil was found. What does this tell about the area at the time the rock was formed? The area was hot. The area was covered by an ocean. The area was on land. The area was cold.

1. Which of the following statements best describe the difference between angiosperms and gymnosperms? A. Angiosperms produce cones to protect their seeds; gymnosperm seeds are surrounded by fruit. B.

If DNA polymerase is observed to pause as it is synthesizing genetic material from a template strand, this is likely the result of: (A) DNA polymerase encountering a "bulky lesion" on the template strand.

Do all social hazards result from an individuals lifestyle choice? Explain

Some species of wasps are social. The queen starts a colony from scratch each spring. She builds a small nest, and lays and raises a group of female workers. The workers enlarge the nest while the queen continues to lay eggs.