Which of the statements is true of reflexes?

A. All reflex signals must go to the brain.

B. They require conscious thought.

C. They are slow and gradual responses.

D. They are involuntary.

Why is Lazzaro Spallanzani's gastric juice experiment an example of creativity in science?

Applying Ideas Insect bites hurt because the insect injects a toxin into the victim. When certain kinds of ants bite, they inject a small amount of highly irritating formic acid.

Which of the following is NOT a characteristic of all living things? A. adapt to change B. take in oxygen C. made of cells D. respond to stimuli

What do you call the living part of an environment? A. abiotic B. ecosystem C. population D. biotic

When an accurate experiment is repeated by another scientist, the results A) should be similar to those obtained originally. B) will be identical every time the experiment is repeated. C) should be completely different for a different scientist.

Select the correct answer. Which term refers to a fact that naturally occurs in the universe? A. scientific law B. scientific inquiry C. conclusion D. hypothesis

The process of moving water from its source to some place where humans use it, such as homes and farm fields, is called

When Charles Darwin published the Origin of Species, he provided evidence for which of the following concepts related to evolution? (choose all that apply) a. descent with modification as a process for speciation b.

Which animal group has mostly live births?

What are the stages of the plant life cycle