The penis delivers sperm<span> through the urethra. The two testicles (or testes) produce</span>sperm<span> and the male sex hormone testosterone. Nest to each testicle, the epididymis is a light‑colored tube where </span>sperm<span> is stored. ... In the human </span>reproductive<span> process, two kinds of sex cells, or gametes, are involved.
Though i must say, this is quite inapprrporiate.
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Answer:
It has a postanal tail.
It has pharyngeal arches.
Answer:
Fungi indirectly help the fishes by providing digested organic nutrients to their prey insects.
Explanation:
According to the given information, fishes are predators of insects. These insects feed on dead leaves. The insects are not able to digest the cellulose of dead leaves. Fungi breakdown the dead and decaying leaves and digest the complex molecules such as cellulose into simpler organic nutrients which in turn are consumed by insects.
If fungi do not decompose the dead leaves, insects would not be able to derive the organic nutrients from them. A shortage of food supply to insects would starve them. Unavailability of prey insects would starve fishes. Thereby, fungi indirectly benefit the fishes to obtain their nutrition from the insect.
It is an example of directional selection.
The different kinds of natural selection can influence the distribution of phenotypes within a population. In stabilizing selection, an average phenotype is preferred.
In directional selection, a modification in the surrounding changes the spectrum of the observed phenotypes, and in diversifying selection the extreme values for a trait are preferred over the transitional values. This kind of selection usually pushes speciation.
The directional selection, in the field of population genetics, refers to a mode of natural selection in which an extreme phenotype is preferred over other phenotypes, making the allele frequency to change with time in the orientation of that phenotype.
Water or other molecules move down their concentration gradient without any energy.........
difference - simple diffusion uses help of transporting protein in the membrane whereas osmosis uses no help.
