People who are lactose intolerant can often consume some products made from milk such as cheese and yogurt because microorganisms in their digestive system consume the lactose. By comparison, people with a true milk allergy, which involves an immune response to milk protein, cannot consume milk or products made from milk. Given this information, what can you conclude about milk?
A. The protein that causes a true milk allergy is lactose.
B. All people who are lactose intolerant are also allergic to milk.
C. Yogurt contains live and active cultures of Lactobacillus acidophilus bacteria and therefore prevents an allergic response in people with a true milk allergy.
D. Lactose is a carbohydrate, not a protein and is therefore not the cause of true milk allergies.
D
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Which of the following statements is not true of early plant evolution, as we have learned from Rhynie cherts?
A. Early vascular plants were small, up to 15 cm tall. B. Early vascular plants branched repeatedly and contained sporangia at their tips. C. The stems of early vascular plants lacked a cuticle or stomata. D. Some of the early plants have a branched sporophyte, but no evidence of vascular tissue. E. Fossils indicate that the roots and leaves of lycophytes evolved independently from those of ferns, horsetails, and seed plants.
Many of the signs and symptoms of inflammation, including redness and itching, are due to the release of (histamines/leukotrienes/proteases) by degranulation of mast cells.
Fill in the blank(s) with the appropriate word(s).
What is the first step in seed germination?
a. emergence of the embryonic root b. diffusion of water into the seed c. hydrolysis of starch d. meristem cells divide rapidly e. cotyledons emerge from the seed
What color of light is not used for photosynthesis? How could you know this just by looking at a leaf?
What will be an ideal response?