What is the importance of accessory photosynthetic pigments to multicellular algae and other photosynthetic organisms?
What will be an ideal response?
Accessory pigments broaden the usable spectrum of available light by absorbing light at wavelengths that are not absorbed by the primary photosynthetic pigment, chlorophyll a.
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What region of the 5-week embryo gives rise to the midbrain?
a. telencephalon b. diencephalon c. mesencephalon d. metencephalon e. myelencephalon
Which adrenal gland hormone plays a role in urine concentration in the kidneys?
a. cortisol b. antidiuretic hormone (ADH) c. aldosterone d. sex hormone e. epinephrine
One of the problems associated with assisted reproduction is that ____
a. technology for effective gamete freezing has not been developed b. the techniques for intrauterine implantation have not been fully explored c. deleterious recessive alleles can be passed on to offspring d. sperm cannot live outside the human body e. the potential harm to the mother is largely unknown
A population of fruit flies is maintained at 4,000 individuals for t generations. During the 11th generation, the professor in charge of the flies forgot to by fly food and only 100 flies survived. What is the effective population size of this population?
What will be an ideal response?