Which theory states that all living things are composed of cells?
A) cell theory
B) Hooke's rule
C) evolutionary theory
D) Mendel's law
A
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In which of these mitosis phases is the replication of DNA accomplished?
This diagram shows the steps in mitosis, with labels to reference in the questions below.
A. A, which is prophase.
B. E, which is cytokinesis.
C. None of these answer choices is correct.
D. A, which is mitosis.
E. C, which is telophase.
In seed plants, which develops into a pollen grain?
a. megaspore b. microsporangium c. microspore d. female gametophyte e. megasporangium
The biomass of a community is the weight of the
a. material decomposed in a year. b. producers. c. living organisms. d. consumers. e. decomposers.
What is the purpose of the waxy cuticle in plants?
a. It prevents desiccation. b. It prevents transpiration. c. It prevents diffusion of gases. d. It prevents the transport of nutrients. e. It prevents the internal transport of water.