Unit test Based on the data, which of the following statements best describes an effect of population density on rat
populations?
Choose 1 answers
High population density decreases the birthrate,
B
High population density increases the number of successful matings.
High population density increases the male to female ratio.
High population density decreases the death rate.
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About how much of the cell mass is watet

Why should organisms reproduce more offspring than will survive? select all that apply.

Embryonic stem cells are cells derived from an embryo. these cells can be used to create new tissues for patients suffering from certain illnesses and disorders. which statement best summarizes why the use of embryonic stem cells could be seen as unethical? a. some people consider embryos to possess rights equal to those of fully developed human beings. b. extracting stem cells from embryos is a very energy-intensive process, which consumes resources that could be used elsewhere. c. embryos are difficult to obtain, so the monetary cost of using them for research outweighs their benefit. d. the process of extracting stem cells from embryos generates biohazardous waste that cannot be safely disposed of.