Biology, 05.12.2019 06:31 beserkerbradley7985
Amain difference between asteroids and comets is usually not: a. composition b. size c. appearance d. place of origin
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Biology, 21.06.2019 22:20
Which best describes how the common cold spreads in the human body? a bacteria burst out of normal cells killing them b viruses replicate inside respiratory cells c bacteria inject dna into normal cells d viruses insert dna into bacteria
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Biology, 22.06.2019 07:00
What is the main function of the central vacuole in a plant cell? a. absorbs energy from the sun to produce food b. holds water and maintains turgor pressure c. breaks down molecules to release energy d. contains the cell's genetic material
Answers: 1
Biology, 22.06.2019 13:10
Which of the following best describes the purpose of the parathyroid hormone? a. it decreases the blood calcium level and decreases blood phosphorus level. b. it decreases the blood calcium level and increases the blood phosphorus level. c. it increases the blood calcium level and increases blood phosphorus level. d. it increases the blood calcium level and decreases blood phosphorus level.
Answers: 2
Biology, 22.06.2019 14:00
Which tool could you see a plant cell? a. a filter b. a microscope c. a microwave d. an electromagnet
Answers: 1
Amain difference between asteroids and comets is usually not: a. composition b. size c. appearance...
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