Why scientists might use models to represent Earth's processes.

Many bacteria do not interact with humans, but those that do can always be classified as either harmful or not harmful to humans. True or False? Select one: a. True. They always either hurt us or they don't. b. False.

Which type of vegetation is not frequently found in the tundra? A) Mosses B) Shrubs C) Lichens D) Trees

What is a diploid number of chromosome? and why is it called diploid?

Explain how interspecific competition may lead to resource partitioning, providing an example.

Which two processes result in the formation of igneous rocks?

How is the brain able to differentiate between each sensory modality? A The action potentials, sent along the same nerve tracts, get sorted by the thalamus B The action potentials for each sense are sent along separate nerve tracts.

Nearly all cells in an organism contain identical DNA, and each DNA strand may contain hunndreds or thousands of individual genes. Is it likely that a cell would transcribe all the genes within its nucleus simultaneously. A. True B. False

Which of the following is true regarding brain development and aging? a. Blood flow is increased in the brain. b. The brain uses more oxygen. c. The brain becomes smaller and lighter. d.

Which stage of the cell cycle involves cell growth and DNA replication? A) mitosis B) cytonesis C) interphase D) prophase

Approximately what percentage of a human's DNA is used for coding information for the synthesis of proteins?