Choose the answer that best describes the sequence of the scientific method
A) observation, hypothesis, experiment, conclusion
B) guess, hypothesis, experiment, conclusion
C) experiment, observation, hypothesis, conclusion
D) observation, hypothesis, experiment, absolute fact
E) hypothesis, experiment, observation, conclusion
Answer: A
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Biological membranes are held together mainly by ____
a. hydrogen bonds between lipid molecules b. hydration layers over lipid molecules c. exclusion of the nonpolar regions of lipids by water d. hydrogen bonds between water molecules e. surface tension at the interface between layers of water molecules
Four of the five answers listed below are characteristic of meiosis. Select the exception
a. involves two divisions b. reduces the number of chromosomes c. results in producing genetically identical cells d. produces haploid cells e. occurs in the gonads
How did the first life on Earth obtain energy?
A. photosynthesis in the presence of oxygen B. photosynthesis in the absence of oxygen C. heterotrophic consumption of organic molecules D. autotrophic consumption of organic molecules E. phototrophic consumption of inorganic molecules
Moss is an example of which type of plant?
a) haplontic plant b) vascular plant c) diplontic plant d) seed plant