James was observing cells under a microscope. He observed some cells which had a layer outside the plasma membrane. What is this layer called?

A. Cell membrane

B. Cell wall

C. Nuclear membrane

The human digestive system cannot break down

A single strand, twisted back on itself like a hairpin, best describes Question 8 options:

What is the name for the concept that certain neurons in the visual cortex are activated only by specific patterns?

The method in which fossils are dated using isotopes is called: a. relative dating c. radiometric dating b. cladistics d. evolutionary taxonomy

Are amino acids outside the active site important for optimal function of the enzyme?

Which of the following statements explains why viruses are considered non-living? Question 2 options: A) viruses are too small. B) Some viruses have RNA for genetic material instead of DNA.

Which of these is considered to be the "king" of the social sciences Geography Economics Sociology Political science

How much time have organisms had to change?

Which winds are usually warmer and more humid? Winds blowing from the north Winds blowing from the south Winds moving from the land Winds moving toward the ocean

Phylogeny refers to a. the evolutionary history of a group of related organisms. b. a group of organisms that includes an ancestor and all of its descendants. c. Darwin's method to classify organisms. d. all of the above