The gametes of the two sexes are often dramatically different in size and morphology. If both gametes have a haploid nuclei, then what do female gametes contain more of?
What will be an ideal response?
cytoplasm and organelles
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How is salt extracted from the sea?
What will be an ideal response?
Gel electrophoresis separates the DNA fragments according to ____
a. their stage in replication b. their size c. their ability to bind to the gel d. the orientation of the nucleotides in the fragment e. their type
A country's ecological footprint can be calculated by multiplying its population size by the footprint of each individual. Why are some ecologists concerned about the ecological footprint of a country like India
A. Its population is increasing. B. Its standard of living and land area are increasing. C. Its population and land area are increasing. D. Its standard of living is increasing. E. Both its population and standard of living are increasing.
Most allergy medicines contain antihistamines that block the actions of histamine. These drugs reduce cold symptoms by directly
A. stimulating components of the immune system through the release of cytokines. B. stimulating the production of specific antibodies. C. blocking or reducing the inflammation response in mucous membranes. D. recruiting macrophages to the nasal epithelium. E. lysing virus-infected cells and preventing further propagation of the pathogen.