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Biology, 21.06.2019 16:00
Elements and compounds are pure substances that cannot be broken down physically into a simpler substance. a physical change doesn’t break the bonds between atoms of a substance or form new ones. compounds can be broken down by a chemical change. a chemical change breaks chemical bonds and/or forms new ones between atoms of a substance. what simple substance would a compound break into? the basic elements that make it up! for example, if you passed a very strong electric current through water you’d break the chemical bonds in water and be left with oxygen and hydrogen. which of the following is an example of a chemical change? a separating water into different glasses b breaking frozen ice cubes with a hammer c running an electric current through water d boiling water to evaporate it on a stove
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Biology, 23.06.2019 02:30
When the grand canyon formed many small mammal population were divided. some members of the population were on one side and others are on the other, therefore, they were no able to mate with one another. over time this separation and inability to mate with one another led to the emergence of new species. this type of speciation is called a) sympatric speciation. b) allopatric speciation. c) parapetric speciation. d) peripatric speciation.
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Biology, 23.06.2019 03:00
15. what can be inferred from the fact that there is little diversity in the form of mc1r gene found among individuals from equatorial africa?
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Biology, 23.06.2019 04:40
Radial (lateral) and ulnar (medial) collateral ligaments restrict side-to-side movements of the joint.
Answers: 1
Why is caffeine unlikely to cross through the phospholipid bilayer?...
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