Animal cells have all of the following EXCEPT:
A) a nuclear envelope
B) mitochondria
C) golgi apparatus
D) chloroplasts
Ans: B) mitochondria
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Protocells likely grew within microscopic compartments in porous alkaline vent chimneys, where ____
a. protocells could use the energy provided by H+ gradients b. the vents offered physical protection c. protocells could use readily available ammonia sources d. the vents funneled geothermal warmth e. the vents were the right size
During thermoregulation, how does an endotherm respond to a high body temperature?
A) Blood vessels near the skin dilate. B) Blood vessels near the skin constrict. C) The brain shuts down to prevent damage. D) Blood glucose levels increase to stimulate metabolism.
The larger muscle fibers found in males account for the fact that males tend to be, on average, stronger than females
Indicate whether the statement is true or false
Climbing plants, such as vines, rely on touch to navigate and develop tendrils that coil around objects they encounter. Roots also rely on touch to navigate their way through the soil. When roots come into contact with an object, they generally grow in a direction away from the object. Based on this information, which of the following statements is true?
A. The tendrils are displaying a negative thigmotropic response while the roots are displaying a positive thigmotropic response. B. The tendrils are displaying a thigmotropic response while the roots are displaying a thigmonastic response. C. The tendrils are displaying a positive thigmotropic response while the roots are displaying a negative thigmotropic response. D. Both tendrils and roots are displaying thigmonastic responses to an object in the environment. E. The tendrils are displaying a thigmonastic response while the roots are displaying a thigmotropic response.