During which time period did land plants, insects and vertebrates animals first appear?

Which of those is an environmental coast of tar sand extraction

Would you except to find a muscle tissue in a plant. Why or why not

Which of the following is a bivalve? a. crab b. shrimp c. tuna d. oister e. spongbob

A scientist has been working for 15 years to develop a new type of plastic material, but she has not yet been successful. Which of the following best explains why her work is still a success?

Which type of reproduction is when two cells come together to produce a new individual? asexual fission sexual budding

When an unbalanced force acts on an object, a. the object's motion does not change. b. the object accelerates. c. the weight of the object decreases. d. the inertia of the object increases.

Name Producers in the Amazon River.

Janice had been experiencing mild flu-like symptoms before going into premature labor at seven months. The premature baby boy developed complications immediately after birth, running a fever and demonstrating neurologic abnormalities.

What does carrying capacity mean? A. the maximum number of reproducing members in a population B. when growth rate start to decrease C. when growth rate levels off at zero D. when growth rate is at its highest

How does the energy in food become available to organisms?