Seedless vascular plants include all of the following EXCEPT
A. Psilotum-Pteridophytes.
B. Sphagnum-Bryophyta.
C. whisk ferns-Psilotophyta.
D. horsetails-Sphenophyta.
Answer: B
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Antigen presented within Type I MHC molecules will activate T________ cells, while antigens presented within Type II MHC molecules will activate T ________ cells.
A. cytotoxic; helper B. CD4+; CD8+ C. helper; cytotoxic D. regulatory; cytotoxic
Gerard is a 10 year old boy in a family of five
To which member of his family would his MHC genes be the most the same?
a. his father, Donn b. his mother, Sabine c. his sister, Eliza d. his identical twin, Gerome e. his identical twin, Gerome, and his sister, Eliza, would have MHC genes equally the same as Gerard’s
Which of the following occurs during forced expiration?
a. The alveoli inflate. b. The ribs move upward. c. The internal intercostal muscles contract. d. The floor of the thoracic cavity moves downward. e. The pressure increases in the thoracic cavity.
Large structures (e.g., ribosomes) form spontaneously from their macromolecular components by a process known as ________-________.
What will be an ideal response?