Biology, 24.08.2019 01:00 hunterthompson2
How does the immune system work together with the circulatory system to function properly? a. the infection site receives oxygen-depleted blood from the circulatory system's arteries, so the immune system works harder. b. pathogens released by immune cells cause increased blood flow to the infection site, which brings other pathogens to the area more quickly. c. red blood cells move through the body (to parts where they are needed) in the blood vessels of the circulatory system to fight infection. d. the white blood cells of the immune system fight and destroy pathogens.
Answers: 1
Biology, 21.06.2019 19:30
Which statement best describes a keystone species? o a. it has littlelmenetic variation. it has an extremely high population. 0 b. 0 c. it remains unaffected by all environmental changes. od. it has a strong influence on the ecosystem. 0 e. it's the first species to populate a new ecosystem.
Answers: 2
Biology, 22.06.2019 03:00
Why do leaves change color in the fall? green pigments break down and no longer mask the color of chlorophyll. chlorophyll breaks down and no longer masks the colors of other pigments. red- and yellow-colored pigments grow and mask green-colored chlorophyll. green-colored chlorophyll breaks down and turns red and yellow.
Answers: 2
Biology, 22.06.2019 10:00
Which is an example of a vestigial structure? a. tail of a monkey b. fin of a fish c. flower of a plant d. tailbone of a human
Answers: 2
Biology, 22.06.2019 12:30
Select the word from the list that best fits the definition the temperature to which air must cool to be saturated
Answers: 3
How does the immune system work together with the circulatory system to function properly? a. the i...
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