A disadvantage of using an attenuated live microbe in a vaccine is that it can conceivably mutate back to a virulent strain.
Answer the following statement true (T) or false (F)
True
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Of the subphases of prophase I of meiosis, the phase at which mammalian egg cells are arrested for years during oogenesis is
A) leptotene. B) zygotene. C) pachytene. D) diplotene. E) diakinesis.
Would meiosis, when it was discovered, have been understood without Mendel's work? Explain why
or why not, using Mendel's three key findings about inheritance.
What will be an ideal response?Prokaryotic cells ________
a. reproduce mainly by prokaryotic fission b. have membrane-bound nuclei containing DNA c. are always spherical d. contain membrane-bound organelles such as mitochondria
The above figure reveals which of the following about
the organism that it was obtained from? a. male b. female c. human d. mouse e. two of these are correct