1. In what ways can we (humans) impact the Earth's systems?
A. Humans can negatively impact th...
Biology, 25.04.2020 23:13 HalpMehPlz
1. In what ways can we (humans) impact the Earth's systems?
A. Humans can negatively impact the environment by building several buildings and roads in a short amount of time.
B. humans can positively impact the environment by using alternative sources of energy and conserving energy.
C. both A and B
D. none of the above
Answers: 2
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The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?
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Which is an advantage of having memory cells when a pathogen is encountered for a second time. a) the memory cells are what proliferate into clones of cells in response to the binding of an antigen. b) memory cells are vital to the primary immune response in that they immediately recognize pathogens even at the first encounter. c) memory cells are essentially effector cells that are short lived and attack antigens even without having a receptor specific to that antigen. d) it ensures that more lymphocytes with a receptor specific to a particular antigen will be present than in a host that had never encountered that pathogen.
Answers: 1
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Biology, 22.06.2019 21:00
Mulitple choice which of the following is a function of the nucleus? a. stores dna b. stores sugars c. builds proteins d. packages proteins
Answers: 1
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