Biology, 10.03.2020 03:05 sarahortega459
Most tumors that originate in the brain are not cancer, but growth of any tumor within the confined space of the skull can put pressure on surrounding nervous tissue and thus harm neurons. Treating brain tumors with drugs is difficult because of the blood–brain barrier. Lipid-soluble drugs can penetrate this barrier, but they get into and affect all other cells too. Explain why.
Answers: 2
Biology, 21.06.2019 19:00
2. if scientists identify an animal with bilateral symmetry and no segmentation, which phylum can it definitely not belong to? a. roundworms b. annelids c. mollusks d. flatworms
Answers: 1
Biology, 22.06.2019 01:20
Consider the model of the oxygen cycle on earth. the majority of earth's oxygen reservoirs are found in the a) atmosphere. b) biosphere. c) hydrosphere. d) lithosphere.
Answers: 1
Biology, 22.06.2019 20:00
Which of the following statements about genes and traits is true? a single trait can be controlled by multiple genes. a single gene can control a single trait. a single trait can alter multiple genes. a single gene can influence multiple traits.
Answers: 3
Most tumors that originate in the brain are not cancer, but growth of any tumor within the confined...
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