Biology, 20.12.2020 14:10 liyahheadhigh
A Why is it useful for crabs that live on the seashore to have both lungs
and gills.
b If equal volumes of blood go through the lungs and gills of light-blue
soldier crabs suggest the mean percentage of oxygen that would be found in
the blood has gone through only the gills. Explain your reasoning.
c What does this tell you about how efficient both lungs and gills are in these
crabs?
d Suggest three reasons for this difference.
Answers: 1
Biology, 21.06.2019 22:00
Explain why phospholipid molecules form a bilayer. (3 marks)
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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 04:30
This part insulates the reaction chamber from the transfer of heat to or from the surrounding environment
Answers: 1
Biology, 22.06.2019 15:00
Tom wants to conduct a scientific study but he needs to finish by the end of the school year. what practical way could tom work around this limitation and be successful in his study?
Answers: 2
A Why is it useful for crabs that live on the seashore to have both lungs
and gills.
b If equ...
b If equ...
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