Birds generate a lot of heat, especially during flight. Yet the adipose tissue under their skin and the feathers atop their skin make it difficult to eliminate excess heat across the skin
Which of the following alternatives can absorb body heat and eliminate it from the bird most effectively?
A) air in the air sacs
B) lymph in the lymphatic vessels
C) blood in the vessels
D) blood in the heart
E) urine in the bladder
Answer: A
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Lysosomes are considered to be part of the endomembrane system because they _____
A) deposit end products of digestion in the endoplasmic reticulum B) facilitate movement between stacks of the Golgi C) are formed from products synthesized by the endoplasmic reticulum and processed by the Golgi D) are composed largely of phospholipids
The ____ represent an internal respiratory system
a. skin folds on an amphibian b. broad, flat body of a flatworm c. branched gill filaments d. folds within human lungs e. gills on a salamander
What is a requirement for glycolysis to proceed?
a. Glucose must enter the mitochondria. b. There must be an input of energy from ATP. c. Oxygen must be available. d. Heat must be supplied. e. Carbon dioxide must be available.
Which reefs are directly impacted by human activity the most?
a. Barrier reefs b. Fringing reefs c. Patch reefs d. Atolls