What type of pathogen is targeted by a cytotoxic T cell?
A. an encapsulated bacteria
B. an opsinized pathogen
C. a virus-infected host cell
D. All of the answer options are correct.
C
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Trees allocate most of their tissue mass to supportive and conductive tissues in the trunk
Indicate whether the statement is true or false
Why is the amniotic egg considered a key evolutionary innovation?
a. It enables eggs to float in an aquatic medium. b. It greatly increases the survival probabilities of eggs in a terrestrial environment. c. It extends embryonic development. d. It prohibits external fertilization, thereby facilitating the evolutionary innovation of internal fertilization. e. It has a shell with a single membrane.
You found the following plants growing on campus during a field trip: a small plant with a notable absence of root hairs; a short, stubby plant with an enlarged taproot; a tall annual herb with fungal strands extending from its roots; a low-growing
plant with nodules on the roots; and a woody shrub with an extensive fibrous root system. Based on this scenario, which plant is most likely a legume with nitrogen-fixing bacteria? A) The woody shrub with the fibrous root system B) The plant with the root nodules C) The plant with the enlarged taproot D) The annual herb with the fungal-root association E) The plant with no root hairs
Answer the following questions true (T) or false (F)
1. Human herpesvirus 4 is better known as cytomegalovirus. 2. Both bubonic and pneumonic plague cause the formation of buboes and tissue necrosis of the extremities. 3. Cytomegalovirus may be latent for years and reactivate when immunosuppression occurs.