Explain the reproductive advantage that an angiosperm (like apple trees) would have over mosses.

The name angiosperm is derived from the Greek words angeion, which means urn/vase, and sperma, meaning seed and gives us clues to the main feature of this group. In the flower, the eggs are protected within a structure called the ovary, which will develop in the fruit, carrier of the seeds.

Flowers are, therefore, the structures responsible for the reproduction of angiosperms, being their exclusive characteristic. In moss and ferns, reproduction is ensured by very simple structures - the sporangia, responsible for spore production. The sporangia are grouped in leaves (sporophylls) that can be more or less modified concerning the leaf pattern of the plant. The unicellular spores are easily carried by the wind, can travel long distances and, when favorable, germinate, giving rise to a new individual (gametophyte). In mosses, the gametophyte consists of a spiral arrangement around the kaolin and the sporophyte consists of an elongated stem (arrow) and a capsule into which the spores are produced.

The most important step in the evolution of gymnosperms is that the embryo is protected by a wrap (integument) and, together with the nourishing tissue, form what we call a seed. The seed replaces spore as a unit of propagation in gymnosperms and angiosperms, conferring great advantages to these groups.

the correct answer is - d. china has a large and growing population.

the fact that china has a large (the biggest) population, and it is still growing, doesn't hinder the agriculture production in the country. in fact, it can for increased production in the agriculture, since there's more labor force, as well the sheer mass of people produces lots of scientists that come up with new inventions as to how to improve this sector. nice example is the inner mongolia region in china, in general dominated by the gobi desert, but few scientist came up with a nice idea as to how to make the region productive by using plants that are very resistant to droughts, so lots of people have been employed, and the region is becoming greener and greener each year, and the production of food in this region is also increasing.