Life began on Earth as multicellular
a. True
b. False
Indicate whether the statement is true or false
False
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Which of these statements is true?
a. 75 percent of the causes of infertility remain unidentified. b. Long-term stress can cause early puberty and more frequent menstruation. c. Proper nutrition is an important factor in supporting fertility. d. In vitro fertilization involves injecting sperm into the uterus.
What is a prokaryote
What will be an ideal response?
What best helps a broken bone heal?
A) grafting new bone to the region B) exercising the area with the broken bone C) taking calcium supplements D) returning the broken bone parts back to their natural shape and then immobilizing the bone
Why do food chains rarely have more than three or four links?
What will be an ideal response?