Which cells display digested viral cell fragments on their surface?
a. dendritic cells
b. helper T cells
c. cytotoxic T cells
d. memory T cells
e. B cells
a
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Four of the five answers listed below are related by the same gender. Select the exception
a. carpel b. ovary c. stamen d. style e. stigma
Plants and algae most recently shared a common ancestor 480 million years ago, and plants colonized land shortly after that. Light, water, minerals, and dissolved gases surround the whole body of a submerged green alga, and the buoyancy of water provides physical support. What adaptation did plants have to make in taking up gasses without drying out when they moved to dry land?
a. Production of pollen b. Development of stomata c. Development of vascular tissue d. Production of a cuticle e. Production of lignin
Examine the picture to answer the following questions and identify the labeled structures. 
A:________B:________C:________D:________E:Is the neuron pictured a sensory, association or motor neuron? What is its function?F:Is the neuron multipolar or unipolar? Explain your answer.
What will be an ideal response?
Which of the following is a true statement about body size and physiology?
A) The amount of food and oxygen an animal requires and the amount of heat and waste it produces are inversely proportional to its mass. B) The rate at which an animal uses nutrients and produces waste products is independent of its volume. C) Small and large animals face different physiological challenges because an animal's body mass increases cubically while its surface area increases as a squared function. D) The wastes produced by an animal double as its volume doubles and triple as its surface area triples.