Why do food chains typically have no more than six links? a) decomposers would not have enough decaying matter to break down for energy. b) with too many links, animals at the end of the chain would have too much food. c) plants would not have enough carbon dioxide to survive, causing a gap in the chain. d) with too many links, animals at the end of the chain would not get enough food to survive.

Which of the following is not a main characteristic that scientists focus on when determining which kingdom an organism belongs to

Select the correct answer. in the image, if the washcloth represents consumed food, which organ of the digestive system correctly represents the action performed by the hands? hands squeezing water from a washcloth a. esophagus b. large intestine c. liver d. mouth

The observations of hooke and van leeuwenhoek documenting the existence of microscopic cells formed the basis of what important theory? a. the cell theory stating that all living things are composed of cellsb. the theory of spontaneous generation, which held that life forms could arise spontaneouslyc. the theory of chemotherapy, or use of antimicrobials to destroy pathogenic organismsd. the germ theory of disease and causative agents