this phenomenon is a natural consequence of evolutionary processes and continental drift
Explanation:
Marsupials are mammals in which newborn offspring are carried in a pouch of the female (mother) body. On the other hand, placentals are mammals that complete embryo development in the mother's body, in the placenta. All the extant marsupials are endemic to Australia and the Americas. It has been shown that marsupials diverged (evolved) in South America, Australia and Antarctica when these landmasses were joined. In Australia, marsupials evolved to fit an ecological niche, which can be attributed to geographic isolation due to continental drift, while placental mammals are relatively recent and more scarce (mainly bats and rodents) within this region.
Homan's Test is an
examination procedure of the ankle to test for dorsiflexion, which signals thromboembolism.
This is done by putting patient in supine position with leg straight, and then
raising the leg 10 degrees. The examiner will then dorsiflex the foot and
squeeze the calf. Pain in the calf upon flexion of the ankle with the leg
straight means a positive Homan's sign.
Excessive irrigation can affect water quality by causing <em>erosion</em>, <u>transporting nutrients</u>, <u>pesticides</u>, and <u>heavy metals</u>, or <u>decreasing the amount of water that flows naturally</u> in streams and rivers.
Soil erosion due to land clearance and grazing. contaminated soils due to <u>pesticides</u> or <u>overuse of fertilizers</u>.
Air emissions from livestock operations make up 1<u>4.5 percent of global greenhouse gas</u>. Livestock farming emits several <u>greenhouse gases </u>that contribute to <u>climate change</u>, and may also be subject to the effects of <u>climate change</u> due to increased animal stress in dealing with rising temperatures.
