Answer:
The correct answer will be option-pollen.
Explanation:
The pollen are the male gametophyte which is produced in the seed plants.
The pollen produce male gametes after entering the female gametophyte. The male gametes fuse with the egg cell and form the embryo inside ovary which matures and forms seeds. The vascular seed plants lack these pollen but instead produces male gametes in gametangia which are replaced by the pollen in the seed plants.
Thus, option-pollen is the correct answer.
Answer:
D (Genotype)
Explanation:
A genotype is the genetic make up of an organism i.e. what the genetic material
of an organism constitutes. Genotype describes the set of genes contained in an organism's genome. According to Mendel, an organism receives two forms of genes called ALLELE for a trait, one from each parent. The genotype of a specific gene coding for a trait is represented by each pair of allele for that trait.
Although the genotype of an organism is outwardly invisible i.e. cannot be seen, but it determines the phenotype of that organism i.e. the outward appearance. For example, if a plant receives T and T alleles coding for tallness, from each parent. The genotype of that plant for the specific height trait will be (TT). Hence, the TT genotype although invisible but controls the tallness of the plant.
If the temperature is warm, then the rate of chemical weathering will be harsher, why is chemical weathering affected by temperature?
Answer:
Ammonia will enter the cells of the fish
Explanation:
The cell-mediated immunity differs from humoral immunity in that they respond differently to invaders. The cell mediated immunity is a type of immune response that dose not involve antibodies, however it involves the activation of phagocytes, antigen specific cytotoxic T-lymphocytes, and the release of various cytokines in response to a foreign body (antigen). The humoral immune response is mediated by antibody molecules that are secreted by plasma cells.
