All the following have only one opening into their digestive system except:

A) corals

B) jellyfish

C) roundworms

D) sea anemones

What are the differences between cells and viruses

A plant found growing in a marsh is about 18 inches in height and consists of tall, hollow stems with jointed nodes. The plant has a rough texture and its leaves grow in tiny whorls.

How does the process of photosynthesis create food? Cells split into two new cells with the identical genetic makeup. Chloroplasts use carbon dioxide and water to create glucose. Mitochondria use oxygen to break down glucose and convert it to ATP.

In psychology there are blank many types of research

Read the scenario . Mrs. Clancy is grading her students' biology exams. Question 5 asks students to circle the answers that reflect genotype. One student's exam has the following answers circled, and Mrs. Clancy marks the question incorrect.

Ground squirrels are found in many areas of the United States. They live in underground burrows and are often attacked by birds of prey, coyotes, and boBCats. Which of the following is a limiting factor for a ground squirrel population?

10. Which of the following is an emerging dis- ease that was unknown 50 years ago? a. malaria b. dengue fever C. Lyme disease d. schistosomiasis

You eat a large meal and then hike up a hill. What kind of energy transformation is your body performing? A. Chemical energy to kinetic energy and nuclear energy B. Potential energy to sound energy and nuclear energy C.

Which nervous systems balance each other to provide homeostasis?

The modern classification system is based on A - putting organisms into categories based on where they live. B - putting organisms into categories based on how they reproduce. C - putting organisms into categories based on similar characteristics.