The circulatory surface provides the interface between the body and the respiratory medium
Indicate whether the statement is true or false.
ANS: F, respiratory
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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.
Even though the steps of photosynthesis that actually produce sugar molecules are part of the carbon
fixation reactions, the light-dependent reactions are absolutely essential for sugar synthesis. Explain the role of the light-dependent reactions in the formation of the end products of photosynthesis. What will be an ideal response?
One explanation for organelle inheritance of disease phenotypes is that ________
A) organelles such as mitochondria are always wild type B) chloroplasts, for example, are completely dependent on the nuclear genome for components C) mitochondria and chloroplasts lack DNA and are therefore dependent on the maternal cytoplasmic contributions D) mitochondria and chloroplasts have DNA that is subject to mutation E) None of the answers listed are correct.
Which of the following statements are true of xylem?
A. It contains specialized cells known as tracheids. B. It is found in the gametophyte generation, but not in the sporophyte. C. It provides structural support to the plant. D. It is found in all land plants. E. It assists in conducting materials, such as water and minerals, throughout the plant.