Caves are formed by the actions of

acid rain

plant roots

river water

groundwater

When using animals in scientific research, it is important that they be treated ethically. Which of the following is an example of animals being treated ethically during an experiment? A. Animals are not allowed to exercise. B.

Name the three types of scientific investigations.

Which statement explains the importance of maintaining a constant internal environment to ensure proper enzyme functioning

A unicellular, eukaryotic organism has flagella and cell walls of chitin. What is it?

Determine what happens if an egg is fertilized and if it is not fertlized, and fill in both of the boxes below.

Two types of behavioral adaptations are ... learned and structural learned and innate structural and innate inherited and structural Which is a behavioral adaptation of birds?

Which body system is correctly paired with its function? A) excretory-produces antibodies to fight disease-causing organisms B) digestive-produces hormones for storage and insulation C) circulatory-transports materials for energy release in body

Which is an example of reverse polarity? a. Earth's magnetic field lines up in the same direction as the present magnetic field. b. The south magnetic pole lines up with the present south magnetic pole. c.

Determine the type of microscope which can only be used to view non-living specimens.

What is the genus of the popular fossils which are similar to "lucy"?