The first step of the scientific method is to
(a) ask a question.
(b) construct a hypothesis.
(c) observe carefully.
(d) formulate a prediction.
(b) construct a hypothesis.
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Garstang's theory states that the vertebrates originated from:
A. larval tunicates that developed the ability to reproduce sexually while retaining the larval body form B. a gradual modification of the adult body form of Urochordates C. larval Cephalochordates that developed the ability to reproduce sexually while retaining the larval body form D. echinoderms with a post anal tail and notochord E. segmented echinoderms
________ are small oligonucleotides, 20—30 nucleotides in length, that bind specifically to mRNA and facilitate the destruction of the mRNA.
Fill in the blank(s) with the appropriate word(s).
Any chemical, physical, or biological change in the environment that harms living organisms is called
A. nitrification. B. an upwelling. C. deforestation. D. ozone depletion. E. pollution.
What problem is associated with using NPP to calculate the carrying capacity for humans?
A) It fails to take into account our need for other resources, such as water, clean air, and fuel. B) NPP isn't important when considering the human population. C) Humans grow their own food, which isn't a part of the NPP. D) It overestimates the effects of humans on the ecosystem.