Biology, 22.10.2019 05:20 adswadsaasdads
Bacteria convert atmospheric nitrogen to which of the following in the process of nitrogen fixation?
question 1 options:
nitric acid
phosphorus
ammonia
nitrogen gas
question 2 (20 points)
question 2 unsaved
during which of the following steps of the water cycle is water changed from a vapor state to a liquid state?
question 2 options:
evaporation
precipitation
condensation
transpiration
question 3 (20 points)
question 3 unsaved
what impact can deforestation have on the water cycle?
question 3 options:
carbon dioxide is released into the air as trees are burned.
photosynthesis increases, thereby increasing the amount of carbon dioxide in the air.
transpiration declines.
the amount of nitrogen-fixing bacteria increases.
question 4 (20 points)
question 4 unsaved
which of the following is the source of energy for the water cycle?
question 4 options:
volcanic eruptions
the sun
winds
gravity
question 5 (20 points)
question 5 unsaved
why is nitrogen fixation such an important step in the nitrogen cycle?
question 5 options:
soil nitrogen is different.
plants can't use nitrogen in the form of n2.
bacteria convert the fixed nitrogen back into n2.
decomposers need to use nh4+.
Answers: 2
Biology, 21.06.2019 23:00
The tasmanian devil, a marsupial carnivore, is facing extinction due to devil facial tumor disease (dftd) which causes bulging cancerous lumps and lesions to erupt around the face and neck — often causing enough deformation to make seeing or eating difficult. dftd has evolved into a contagious cancer, a trait that is unique among cancers. devil mating behavior involves biting around the head and neck, allowing cells from one individual — especially cells from the crumbly dftd tumors — to be transferred to the wounds or face of a new individual. this marsupial was once found across australia, but sea levels rose, isolating the tasmanian population, while the australian population went extinct. what would be an outcome of genetic isolation that is likely to have impacted the spread of dftd? a) reduced territory puts diseased individuals in greater contact with non-diseased ones. b) inbreeding results in less variation in facial features so the cancer is generally fatal. c) genetic isolation has made it difficult for scientists to develop a vaccine against dftd. d) the lack of genetic variation in the immune system of tasmanian devils minimizes resistance to the disease.
Answers: 3
Biology, 22.06.2019 09:50
The frequency of alleles in a population that is in hardy weinberg equilibrium? a . changes in each successive generation b. is less important than the frequency genotypes c. shows evidence of the process of natural selection d. remains the same over several generations
Answers: 2
Biology, 22.06.2019 10:30
What is the main reason that attitudes are more often revealed in spoken rather than written language? a. in writing, we try to put the "best face" on what we write. b. we speak far more often than we write. c. in writing, we can more easily conceal our attitudes. d. in spoken language, we are often careless in our use of words.
Answers: 2
Biology, 22.06.2019 14:30
Asegment id dna that is artificially created from two or more organism through use of dna enzymes in a laboratory is called a segment of dna that is artificially created from two or more organisms through use of dna enzymes in a laboratory is called
Answers: 1
Bacteria convert atmospheric nitrogen to which of the following in the process of nitrogen fixation?...
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