How tall and slender body is useful adaptation in equator?
Answers
Features common to the environment in which yak live are extreme cold, mountainous terrain, high altitudes with reduced oxygen in the air, high solar radiation and short growing seasons for herbage and a variable assortment of herbage, sparse in some areas. Plant growing seasons vary from 120 to 180 days, but the periods of relatively vigorous plant growth are even shorter than that. Wilted herbage provides some sustenance for the yak at other times of year, but not in sufficient quantity for their requirements. There is, of course, some variation in these features. Some "compensatory" factors have also to be taken into account. For example, the more northerly the latitude at which the yak are found, and hence, in general, the colder the climate, the lower the altitudes at which the yak will live. These points will be discussed in more detail later in this chapter. Many of the characteristics of the yak can be regarded as adaptations to these conditions, in which cattle of other species have difficulty in surviving.
Answer:
Explanation:People with tall and slender body have the same volume but greater surface area and therefore more heat being lost to the surroundings. Hence, people living near equator appeared physiologically well adapted to hot dry conditions.