25. which of the following is not an example of a common secondary photopigment?
a. beta-carotene
c. xanthophyll
b. alpha-carotene
d. lycopene

Select the correct answer from each drop-down menu. in an experiment, dr. travis examined the effects of calcium intake on osteoporosis, a condition that causes an increased risk of bone fractures. the amount of calcium is variable. the risk of bone fractures .

All vaccination should(n’t) be mandatory! 1.at least 5 sentences explaining 2.why? 3.in the end summarize the sentence

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above