Which of the following is a difference between primary and secondary active transport?
A. Primary active transport moves solutes in opposite directions while secondary transport moves solutes in the same direction Primary active transport is driven by secondary active transport.
B. In primary active transport, the transport protein gets phosphorylated; in secondary active transport, the transport protein is not phosphorylated.
C. Energy is required for primary active transport, but not secondary active transport
D. Primary active transport is driven by secondary active transport
Answer: B. In primary active transport, the transport protein gets phosphorylated; in secondary active transport, the transport protein is not phosphorylated.
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Answer the following statements true (T) or false (F)
1. Which of the following are true of hagfish? 2. Sharks have cartilaginous skeletons because bone-forming ability had not yet evolved in vertebrates when they originated. 3. The swim bladder is an organ in primitive fish from which the lungs of terrestrial vertebrates developed. 4. The fins of lobe-finned fish are supported by extensions of the skeleton and are moved by muscles within the fin whereas the fins of ray-finned fish are supported by flexible, nonskeletal elements and are moved by muscles from within the fish's body.
Glycolysis occurs in which location inside of a cell?
a. mitochondria b. chloroplast c. cytoplasm d. ribosome
Which statement is NOT true about the human respiratory system?
A. The glottis is closed by the forward movement of the soft palate during swallowing. B. Food and air both enter the pharynx, presenting a potential danger to respiration. C. The glottis is the passageway through the larynx by which air enters the trachea. D. Air reaching the lungs has been warmed to body temperature by passage through the nose and upper respiratory passageways. E. Cilia and hairs in the nose help to filter out foreign materials in the air.
On a hike along the desert slope of the Sierra Nevada Mountains in California, you notice that there is an abundance of pinyon pine and juniper trees. We would identify these two plants as:
A) mutualistic species. B) symbiotic species. C) ecological dominants. D) competitors.