Answer:
Wind.
Explanation:
Gymnosperms are also known as naked plants as their ovules are in the unfertilized state and their seeds do not bear fruits. Gymnosperms are known as seed plants.
Gymnosperms pollen grains are transferred from the pollen cone to the ovule. Their pollen are generally transferred by winds as they are lighter and resistant to water. Sometimes, insects are also responsible for the transfer of pollen grains.
Thus, the correct answer is option (b).
The correct answer is reciprocal cross.
The reciprocal cross is referred to a cross between a male of a specific strain with the female of another strain and the vice versa.
The reciprocal ensures that the inheritance of a certain character in the offspring in independent of the sex. This cross was done by Mendel, by switching the pure breeding lines.
Even after changing the sexes, he got the same results in F1 progeny, which suggest the inheritance of a character is independent of the sex.
Answer: Fertilizers and pesticides contribute to runoff that goes into the water, causing habitat degradation.
Explanation:
Fertilizers and pesticides are the chemical formulations which are added to the agricultural field so as to enhance the growth of the crops and raising their yield. The runoff is the water erosion. In runoff water from any source such as rainwater, water from the snow melt and water from the river stream flows over the surface of soil. It remains unabsorbed within the soil. Such water flows with an appropriate speed and mixes with the water reservoir.
Thus according to the given situation, the fertilizers and pesticides along with the water runoff will be added to the water reservoir. As a result of this the increase in abundance of chemicals in the water source can make the water habitat unfit for the survival of aquatic animals due to contamination.
