The correct answer is c. 3 ' hydroxyl of deoxyribose.
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During the DNA synthesis via PCR, polymerization occurs in 5’-3’ direction. This means that enzyme DNA polymerase which synthesizes a new DNA strand is complementary to the DNA template strand (3’-<span>5’ direction). 5’ phosphate group of the free nucleotides which are added is attached to the 3'-hydroxyl group at the end of the elongating DNA strand.</span></span>
The omnivorous flock will eat the most as it eats both insects and seeds. With the removal of fruit it will not be affected much.
The herbivorous flock will eat the least as it has the option to eat seeds only after the removal of fruit.
Explanation:
Let us take the example of Finches. Finches have many different species with different variations adaptable to conditions favorable as per availability of the type of food.
Lets say -
Species X and Y is provided with insects, seeds and fruit.
Species X - Omnivorous
Species Y - Herbivorous
The species X will be able to eat the most as it is an Omnivore.
The omnivorous flock will eat the most as it eats both insects and seeds. With the removal of fruit it will not be affected much.
Species Y will be able to eat the least as it is an herbivore.
The herbivorous flock will eat the least as it has the option to eat seeds only after the removal of fruit.
Answer:
The correct answer is option B. pheromones.
Explanation:
Pheromones are chemical substances that are released and produced by a different type of animals, into the environment, for marking their territory or affecting behaving of its species.
Wolves communicate by the chemical messages using their sense of smell. Such chemical messages are called pheromones, between different members of the same species.
Thus, the correct answer is option B. pheromones.
A waterborne pollutant can have different effects on aquatic life depending on the nature of the pollutant. A pollutant at lower levels can have minimal or no effect on aquatic life. However, when the concentrations of the pollutant are high, the population of aquatic organisms can be greatly reduced. There are also times when pollutants at lower concentrations cause significant damage. An organism can consume another organism that has absorbed small amounts of the pollutant. As the consumer takes in more of the contaminated organism, the pollutant is magnified in the body of the consumer resulting in lethal concentrations. This is called biomagnification.
