Give three reasons for utilizing aquatic organisms for biotechnology
What will be an ideal response?
• To increase the world's food supply
• To restore and protect marine ecosystems
• To identify novel compounds to benefit human health
• To develop new products through aquatic organisms
• To use aquaculture to monitor and treat disease
• To increase knowledge of biological processes in Earth's oceans
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Indeterminate growth is a characteristic of which of the following plant organs?
A. flowers and roots B. shoots and roots C. leaves and flowers D. leaves and roots E. shoots and leaves
Which factor is least likely to cause a plant to enter abscission?
a. Infection b. Injury to the leaves c. Moderate temperatures d. Decrease of water e. Nutrient deficiency
In humans, nitric oxide is an important gaseous neurotransmitter. Nitric oxide is synthesized by three isoforms of nitric oxide synthase (NOS). What would be a likely effect if a male were missing the gene that codes for one of the NOS isoforms?
A. He would be unable to produce all the liquid components of semen. B. He would have high levels of mutation within his mature sperm. C. He would have difficulty getting and/or sustaining an erection. D. He would have a low sperm count due to decreased spermatogenesis.
After the completion of meiosis in humans a diploid germ cell has produced cells with half the original chromosome number, generating __________ haploid nuclei.
A. 2 B. 3 C. 4 D. 23 E. 46