Science TAKS

Objective 3 What is it? What do I study? How many questions?

Objective 3 Interdependence of organisms and their environment In other words, ecology which is the study of living things and their interaction with the environment. There are eight questions on the test.

Objective 3 How does using killed or weakened bacteria in an immunization help the body prevent infections? F Antibodies are formed that fight those types of bacteria. G The body develops a fever that kills beneficial bacteria. H Bacterial reproductive cycles are disrupted. J Bacteria-fighting viruses are activated

Objective 3 According to this phylogenetic tree, which organism is most closely related to Organism V? A Q B U C W D X

Objective 3 At one time large herds of bison roamed across the Great Plains. Brown-headed cowbirds often followed the bison, capturing and eating insects that scattered as the bison walked through the grasses. This relationship between the bison and the cowbird was — F predatory G competitive H commensal J parasitic

Objective 3 Some plants have a hard waxy coating on their leaves that helps prevent water loss. In which environment do these plants most likely grow? A Desert B Marine C Grassland D Rain forest

Objective 3 A food web is shown above. If the rabbit population increases, which of the following is most likely to happen soon afterward? A The deer population will increase. B The plant population will decrease. C Different birds will move into the area. D The insect population will be eliminated