Classify these examples of symbiosis by type and explain your choice: 1) inside a human’s intestine live bacteria that make vitamin k; 2) a human picks up bacteria on his or her hands. the bacteria do not cause disease but do feed on the human’s dead skin cells; 3) a tick attaches itself to a human and feeds on the human’s blood.

Turtle hatchling survivorship rate is low in many turtle species due to predation. amanda researched the predatory rate on a species of turtle eggs in the red river. the eggs were harvested from trapped turtles and the egg's cloaca film (reproductive discharge) was either washed off or left on once gathered. research suggests that predators use the female's cloaca scent to locate the eggs. the eggs were only handled when wearing gloves and then reburied along islands where the turtles were trapped. the nests were monitored by cameras and manually on foot and data on nest predation were recorded. a. based on the experimental design, what is the dependent variable? b. based on the experimental design, what is the independent variable? c. based on the experimental design, what is the control?

Why is excretion necessary to maintain homeostasis?

Select three sports that require participants to be highly fit before the beginning a: snowboarding b: skydiving c: rock climbing d: bungee jumping e: free diving f: hiking