Explain how the adaptations of cartilaginous fishes make them better predators.
What will be an ideal response?
The evolution of jaws and paired appendages along with more efficient respiration and a better developed nervous system, including sensory structures, allows cartilaginous fishes to chase, catch, and eat larger and more active prey.
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Which type(s) of antigen-presenting cell can activate T cells?
A. Macrophages B. Dendritic cells C. B cells D. All of the choices are correct.
The gene p53 is called the "guardian of the genome" because it corrects mutations in the spindle apparatus before nondisjunction can occur
Indicate whether the statement is true or false
Individuals in this group often have intracellular shells of interlocking plates
a. green algae b. red algae c. euglenoids d. dinoflagellates e. diatoms
Some organisms are capable of orchestrating alterations that are collectively termed antigenic variation. This allows the organism to __________.
A) rapidly move through the host's tissues B) drastically decrease its ID50 C) enter the host's body through more than one portal of entry D) evade the host's immune system