Microscopic organisms that are disease-causing agents are called

a. toxins.

b. carcinogens.

c. pathogens.

d. antibodies.

What is the job of the nucleus

Which cells are considered immortal? neurons blood cells cardiac muscle cells stem cells

Certain cells that line the stomach synthesize a digestive enzyme and secrete it into the stomach. This enzyme is a protein. Which processes could be responsible for its secretion?

What characteristics is shared by a hagfish and a lamprey?

35. A student hypothesizes that thick leg muscles are an inherited trait in dogs. The student collects data on several dogs, and the data show that dogs that live outdoors have thicker leg muscles than dogs that live indoors.

In any ecosystem, there are always more: Select one: a. Animals than plants b. Herbivores than carnivores c. Heterotrophs than autotrophs d. Predators than prey

Which biome would contain the most biodiversity in deciduous tree species? A) taiga B) savanna C) temperate forest Eliminate D) tropical rainforest

If you wanted to show all of the feeding relationships in a particular ecosystem, what type of diagram would be most effective

Bacteria, viruses, protozoa, and green algae are all microbes, but one group is much smaller in size than the rest. Which microbe is the smallest? A. a green algae cell B. a bacterium C. a protozoan D. a virus

The discovery of immense ridges and trenches stretching thousands of kilometers across the seafloor in the 1950s led to acceptance of the theory of