Which system produces blood cells?
a. endocrine
b. skeletal
c. muscular
d. defense
e. integumentary
B
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In transduction, bacterial cells ____
a. take up pieces of DNA that are released as other cells disintegrate b. receive DNA from an infecting phage c. replicate DNA molecules d. make replicate copies of one another e. generate their own DNA
Why are flowering plants considered by many botanists to be the most successful land plants?
What will be an ideal response?
Which of the following transgenic techniques requires linker proteins?
A) Embryonic stem cell method B) Retrovirus-mediated method C) Pronuclear injection method D) Sperm-mediated transfer method E) Plasma cell membrane fusion method
Each ________ on the hemoglobin subunit is capable of binding an oxygen molecule, thereby allowing ________ oxygen to bind with one hemoglobin molecule.
A) globin : four B) heme : four C) globin : three D) heme : three E) free iron : one