Explanation:
E, will be lower- this denotes the activation energy
Activation energy is the specific amount of energy required for a chemical reaction to occur. Enzymes lower the activation energy, significantly speeding up the reaction rate.
Further Explanation:
Enzymes are proteins that catalyze reactions by working on substrates to promote reactions-including amylase breakdown of broad polysaccharides. Some enzymes like catalase, allow for the degradation of hydrogen peroxide into oxygen and hydrogen; the pH, temperature, and involvement of inhibitors influence their specificity.
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Answer:
It basically means that, because of the drought certain foods will be unavailiable. the birds will have to start eating other foods and over time evolution will change their beaks so that the can eat the new food easier.
Explanation:
Answer:
Biogeographic isolation causes changes in gene pools that result from populations being separated.
Explanation:
Biogeographical isolation consists in the separation of a population by a geographical barrier, giving rise to <u>subpopulations</u>.
With isolation, the subpopulations start to suffer different pressures from the environment and consequently the selected genes in one subpopulation will be different from the other subpopulation.
Due to the biogeographic isolation, the two subpopulations will be prevented from crossing and the differences between them will become more and more accentuated, and with that the <u>subspecies</u> appear.
Over time, these subspecies may become so different from each other that reproduction between them becomes impossible.
When this happens, reproductive isolation occurs and, consequently, the emergence of new species. When speciation occurs due to geographic isolation, it is called allopatric speciation.
#19
Polar nuclei fuse to produce Diploid secondary nucleus.
#20
After fertilisation the antipodal cells undergo meosis
#21
In which of the following double fertilisation occurs.
Ans:- Angiosperm s
#22..
In angiosperms pollen grains germinate on the Anther.
An atom is most stable when its outermost shell is full with electrons.