Abdominal organ that filters erythrocytes and activates lymphocytes. True or False

Nudibranchs are marine gastropods that lack shells. many of these gastropods retain the foul-tasting poisons of their prey and secrete them when threatened. the bright coloration of the nudibranchs warns predators to avoid them.

for each set of terms choose the one term that does not belong and explain why it does not belong 1. esophagus pancreas and large intestine 2. pepsin glycogen and glucose

J ames is making models of plant and animal cells using objects supplied by his teacher to represent organelles. For one cell, he will place the objects in a shoebox. First he fills a balloon with water and places it in the shoe box.

Which structure anchors mosses to soil? a. Rhizoid b. Antheridium c. Strobilus d. Prothallus

Which statement best describes the plasma membrane of a living plant cell?

How do animals use sex, besides procreation

15. What are three methods or types of evidence used by scientists to determine when things happened?

Hydroelectric power produces electricity using?

What human activity would have the most significant effect on the temperature of the earth? A) deforestation B) producing smog C) producing CFCs D) burning fossil fuels

Which resource is sometimes unpredictable in terms of energy production?