Answer: Option D. -> That there will be moments for everything.
:
D
Option (d)
The passage stresses on the fact that “there will be time” for everything.

Answer: Option D. -> It cites a specific case that illustrates a problem presented more generally in the previous paragraph.
:
D
The best answer is D.
Looking at the answer options, the last paragraph talks about a particular case that illustrates a problem presented more generally in the previous paragraph.

Answer: Option D. -> They assumed that different ways of separating an embryo into two parts would be equivalent as far as the fate of the two parts was concerned.
:
D
D is the best answer. According to the author, early investigators arrived at the conclusion that the cells of the embryo are undetermined because they “found that if they separated an invertebrate animal embryo into two parts at an early stage of its life, it would survive and develop as two normal embryos” (lines 1-6). However, later biologists discovered that when an embryo was cut in places different from the one used by the early investigators, it did not form two whole embryos. Because the earlier biologists apparently arrived at their conclusion without attempting to cut an embryo in different planes, it would appear that they assumed, erroneously, that different ways of separating the embryos would not affect the fate of the two embryo parts.

Answer: Option C. -> action undertaken in order to discover more information about a problem
:
C
C is the best answer. The question requires you to recognize which of the choices is NOT mentioned in the passage as a component of the classical model of decision analysis. Only this choice, “action undertaken in order to discover more information about a problem,” does not appear in the passage

Answer: Option C. -> cell determination as an issue in the study of embryonic development
:
C
C is the best answer. In identifying the main topic of the passage, you must consider the passage as a whole. In the first paragraph, the author provides a historical context for the debate described in the second paragraph, concerning when and how the determination of embryo cells takes place. The third and fourth paragraphs provide a specific example of the “Recent discoveries in molecular biology” (lines 28-29) that may lead to the resolution of that debate.

Answer: Option A. -> in the cytoplasm
:
A
A is the best answer. In the third paragraph, the author asserts that substances that function as morphogenetic determinants are located in the cytoplasm of the cell and become active after the cell is fertilized. In the fourth paragraph we learn that these substances are “maternal messenger RNA’s” and that they “direct, in large part, the synthesis of histones,” which, after being synthesized, “move into the cell nucleus” (lines 59-68). Thus, it can be inferred that after the egg is fertilized, the initial production of histones occurs in the cytoplasm.

Answer: Option D. -> The five major hormones
:
D
The best answer is D. According to the passage, “The pleiotropy of the five well-studies plant hormones is somewhat analogous to that of certain hormones in animals”. The example given involves certain hypothalamic hormones that “stimulate the anterior lobe of the pituitary gland to synthesize and release many different hormones, one of which stimulates the release of hormones from the adrenal cortex”. These hormones in turn “have specific effects on target organs all over the body”. This “hierarchy of hormones,” as the author calls it, “may also exist in plants”, where the five pleiotropic hormones may “function by activating the enzymes that release … more specific chemical messengers”. Thus, hypothalamic hormones in animals and the five major hormones in plants occupy a similar place in the respective organisms” hormonal hierarchy.

Answer: Option A. -> Follow the labelling strategy of the English-speaking countries
:
A
Option (a)
Refer to the part some areas … have now produced a generation of growers using the varietal nameson their labels.

Answer: Option B. -> Industry is not as innovative as it is made out to be.
:
B
The answer is (b).
The answer can be inferred from the 4th and 6thparagraphs, where the author says that even after "a hundred years and tensof thousands of research hours later" little has changed in the auto industryand also changes in the aviation industry are incremental and largelycosmetic.

Answer: Option B. -> The speed at which an automobile is driven in a city has not changed much in a century.
:
B
The answer is (b).
The answer can be inferred from the 4th paragraph -Henry Ford’s first car did 18 miles per hour and in 2001 the average speedin London was 17.5 miles per hour as stated in the last line of the fourthparagraph.