Why are shelled eggs evolutionarily advantageous?
What will be an ideal response?
Shelled eggs can be laid on dry land without desiccation. The embryo develops within a fluid-filled cavity surrounded by the amnion.
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In bacteria, fungi, and plants the high internal pressure generated by osmosis is counteracted by the mechanical strength of their
A. plasma membranes. B. organelles. C. cytoskeletons. D. cell walls.
Some protists have a pellicle, which is used for ____
a. defensive purposes b. sexual reproduction c. structural support d. water absorption e. food storage
The value of applying DNA profiling to tandem repeat sequences is that
A. they serve as DNA probes, which indicate where disease-causing alleles are found. B. the tandem repeat sequences are those that can be made into recombinant DNA. C. None of the answer choices is correct. D. a more efficient analytical focus is made on small portions of highly variable DNA sequences. E. they signal to researchers where there are genes that can be more easily cloned, or grown in stem cells.
What is the role of the Golgi apparatus in cellular function?
A) Protein packaging B) Replication of DNA C) Protecting the integrity of the cell's shape D) Filling the cell space with fluid E) mRNA synthesis