Which of the following types of algae would have rigid cell walls composed of silica?

a. paramecium

b. euglena

c. diatoms

d. spyrogyra

What is a true difference between prokaryotic and eukaryotic sells

What species is characterized by a vertical forehead?

Can you determine the identity of a mineral based on its properties?

Your dog nudges you from sleep and you reach out to pet the dog. feeling the dog is transmitted through the ___ while petting the dog is transmitted via the ___. a. sensory neurons, motor neurons b. sensory neurons, interneurons c.

Which can remove carbon dioxide from the atmosphere?

Which DNA bases pair with each other? How many hydrogen bonds are shared by each pair?

Which layers of sedimentary rock at Grand Staircase Escalante National Monument do you think are the oldest?

Animals in the higher trophic levels generally share two characteristics. They are typically

Name two ways that carbon enters the atmosphere

Omid is spending the semester in England where the road signs are in km. If he drives from his school into a town 6mi away, how many km will he drive?