Quiz 3A r vestigial s structures oguus structares omolo 20) The endosymbiotic hy

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Quiz 3A r vestigial s structures oguus structares omolo 20) The endosymbiotic hypothesis accounis for the origin of wtich ell r Cell wall strucnure Plasma membrane r Chloroplast r Ribosome 21) Sea squirts and lampreys, which are closely related axqutic animals, have a perforsted pharynx, a ventral heart, and a notochoed at soeme stage of development These simlniti are best explained by r a common ancestry artificial selection. the "Ladder of Nature Inheritance of acquired characteristies uniformitarianism 22) Flowering plants first rose to prominence in the Cretaceous period Paleozolc era Precambrian era. Cambrian peried Eocene epoch 23) Two species of snails are physically unable to mate. This is an example of ecological isolation geographic isolation temporal solation

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Answere :

Question 20 : The correct answere is "chloroplast".Chloroplast and mitochondria both shows evidences for endosymbiont theory.

Question 21 : The correct answere is "a common ancestry". Both sea squirt anf lamprey are chordate showing a relationship of common ancestry.

Question 22 : The correct answere is "cretaceous period". Flowering plant rose to prominence during this period.

Question 23 : The correct answere is "mechanical incompatibility". Both species of snail shows mechanical incompatibility.

Question 24 : The correct answere is "allelic frequency do not change". Equilibrium polulation follow Hardy-wernberg principles which assume that allelic and genotypic frequency do not change.

Question 25 : The correct answere is "darwin and wallace". Both scientist introduced the theory of natural selection on 1858.

Question 26 : The correct answere is "allopatric speciation".

Question 27 : The correct answere is "O2". According to theory on atmosphere of early earth lack oxygen due to highly reduced condition.

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