New York State Chemistry RegentsNew York State Earth Science Regents

Living Environment Regents August 2010 Question 37 PDF Print E-mail
Friday, 27 May 2011 15:16

Correct answer: (4) They result without the union of gametes.

All these organisms reproduce by budding or by binary fission. Budding is an asexual means of reproduction in which outgrowths from the parent form and pinch off to live independently or else remain to eventually form extensive colonies. This is exhibited by the sea anemone (1st organism in the illustration) and yeast (3rd organism in the illustration).  Binary fission occurs in amoeba (2nd organism in the illustration), wherein cells divide by mitosis. The union of gametes only occurs during sexual reproduction.

Incorrect answers:

(1) They vary genetically from the parent.

Any type of asexual reproduction produces genetically identical offspring.

(2) They are produced by the union of gametes.

Union of gametes only occurs during sexual reproduction.

(3) They obtain nourishment from a placenta.

Through sexual reproduction, fertilized mammals form a fetus, which are stored inside the body of the female parent during the embryonic development. Oxygen and nutrients are supplied to the fetus inside the mother through the organ called the placenta. A placenta is absent in the given species above.

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