Which of the following prevents blood from flowing backward through the circulatory system?
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Biology, 23.09.2019 00:30 Averybloemendaal
Which of the following prevents blood from flowing backward through the circulatory system?
smooth muscle in the arteries
smooth muscle in the veins
valves in the arteries
valves in the veins
Answers: 2
Biology, 22.06.2019 00:30
One gene can influence trait(s). one trait can be determined by gene(s).
Answers: 1
Biology, 22.06.2019 04:00
Which statement correctly identifies the scientific question and describes why the question is scientific? question 1 refers to the supernatural.question 2 reflects a moral or social value.question 3 refers to something that can be measured.question 4 reflects a question that can’t be observed.
Answers: 2
Biology, 22.06.2019 05:30
The carbon cycle is best defined as a process in which a. carbon changes from inorganic forms to organic forms and back b. carbon is changed into other elements such as oxygen or nitrogen c. carbon is continually created from the sun’s energy by plants d. carbon is consumed and regenerated from other elements such as oxygen and nitrogen
Answers: 1
Mathematics, 30.08.2019 07:30
Mathematics, 30.08.2019 07:30
Mathematics, 30.08.2019 07:30
Mathematics, 30.08.2019 07:30
Mathematics, 30.08.2019 07:30
Mathematics, 30.08.2019 07:30
Biology, 30.08.2019 07:30