Which of the following traits characterizes gymnosperms?
a) The plants carry exposed seeds on modified leaves.
b) Reproductive structures are located in a flower.
c) After fertilization, the ovary thickens and forms a fruit.
c) The gametophyte is longest phase of the life cycle.
Ans: a) The plants carry exposed seeds on modified leaves.
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Which of the following are Rubisco substrates?
A. O2 B. CO2 C. RuBP D. CO2 and RuBP E. CO2, O2, and RuBP
The distinction between karyogamy and plasmogamy is:
A. Karyogamy is the fusion of nuclei and plasmogamy is the fusion of the cytoplasm. B. Karyogamy is the fusion of cytoplasm and plasmogamy is the fusion of nuclei. C. Karyogamy is the fusion of dikaryotic cells and plasmogamy is the fusion of gametes. D. Karyogamy is the fusion of hyphae and plasmogamy is the fusion of mycelia. E. Karyogamy is the fusion of nuclei and plasmogamy is the attack of blood plasma by fungal pathogens.
How successful is the technique of cloning adult mammals by implanting DNA into donor eggs?
a. Few embryos survive until birth, and of those that do, many have serious health problems. b. About half of the embryos survive until birth, but many of these die before adulthood. c. Of the embryos that survive until birth, health outcomes are predictable. d. Most embryos survive, but are not able to reproduce as adults. e. Most embryos survive and lead healthy adult lives.
Which component of the blood is most important for clotting?
A. plasma B. platelets C. leukocytes D. erythrocytes E. All of the choices listed for this question are important for clotting.