The force driving simple diffusion is _____, while the energy source for active transport is _____. a. the concentration gradient; atp b. phosphorylated protein carriers; atp c. the concentration gradient; adp d. transmembrane pumps; electron transport and. atp; phosphorylated proteins.
Deer run in zigzag patterns when being chased by predators. What type of adaptation is this? a. Behavioral b. Physiological c. Structural d. Ecological
Pollution is the only way that humans can cause changes to ecosystems. Please select the best answer from the choices provided T F
The large size of the musk ox _______. a. helps minimize heat loss b. is offset by its long legs c. helps the animal graze less often d. helps maximize heat loss
The __________ in the back of the eyeball is made up of millions of rods and cones. lens retina iris pupil
Water plays a key role in chemical weathering by ________. A.) dissolving minerals B.) transporting minerals C.) contributing to the oxydation process D.) all of the above
Why has the kingdom protista been abandoned? see concept 28.1 (page 592) view available hint(s) why has the kingdom protista been abandoned? see concept 28.1 (page 592) some protists are multicellular. the kingdom protista is not monophyletic. some protists are more closely related to plants, animals, or fungi than they are to other protists. some protists are as small as prokaryotes. the second and third answers are correct. submit?
How could serfs move up from the bottom of the social hierarchy? a) Most peasants were also serfs. b) Serfs were always below peasants in the medieval hierarchy c) Serfs worked in the manor house, and peasants worked on the land. d) Serfs had more freedom than peasants
With regard to enzymes, key is to lock as A) substrate is to activation energy B) product is to substrate. C) enzyme is to active site. D) substrate is to active site.
When you decide to execute a maneuver, you will need a control zone of approximately __________ seconds?
Glycolysis begins with _________ and ends with __________. pyruvate; water pyruvate; glucose glucose; pyruvate pyruvate; acetyl-coa
Which of the following makes the best analogy to describe the movement of energy in an ecosystem A.pool B.lake C.river D.pond
Which structural component is found in DNA but not in RNA? A.ribose B.deoxyribose C.phosphate group D.nitrogenous base
What device can be used to make measurements globally? a. rain gauge b. buoy c. satellite d. thermometer
What characteristics do mutations have? always harmful occasionally beneficial omission of information addition of information mistakes in copying
How does the phosphorous cycle differ from the nitrogen cycle and the carbon cycle? A. The phosphorous cycle enters both water and atmosphere, unlike the nitrogen cycle and the carbon cycle. B. The phosphorous cycle occurs only in the atmosphere, unlike the nitrogen cycle and the carbon cycle. C.The phosphorous cycle does not enter the atmosphere, unlike the nitrogen cycle and the carbon cycle.
Air pollution is only caused by human activity. true or falseair pollution is only caused by human activity. false.
Which describes the habitat of a frog? A. color for camouflage B. prey for snakes C. eats insects D. marshes and ponds.
Which of the following would be considered a limited resource in the lower depths of the ocean? a. water b. sunlight c. prey d. predators
Which atmospheric level is farthest from the lithosphere? troposphere stratosphere thermosphere mesosphere
A countercurrent heat exchanger enables an animal to _____. see concept 40.3 (page 883) increase heat loss by evaporation slow metabolism when food is not available reduce the loss of body heat to the environment absorb heat from the environment produce more heat when needed
Which component cannot be part of this strand? a. uracil b.thymine c. phosphate group d.deoxyribose sugar?
In Figure 28-7, what information indicates that meiosis takes place during the jellyfish's reproductive cycle? Download png