Rats have poor vision and rely on their senses. In the realm of vision, a human's vision is much better than a rat's. Humans see three colors (blue, green and red) at high saturation levels, while rats probably perceive just a hint of ultraviolets, blues and greens. Our vision is quite sharp; we can see long distances and have good depth perception.
A rat's vision, however, is quite ...
2 Answers
The Whale Rider was written by Witi Ihimaera. The story is about eight-year-old Kahu, a member of the Maori tribe of Whangara, New Zealand, fights to prove her love, her leadership, and her destiny. Her people claim descent from Kahutia Te Rangi, the legendary "whale rider." In every generation since Kahutia, a male heir has inherited the title of chief.
But now there is no male heir, ...
1 Answer
The antarctic minke whale was given the name balaenoptera bonaerensis by Burmeister in 1867. The Antarctic minke whale or southern minke whale is a species of minke whale within the suborder of baleen whales. It is the second smallest rorqual after the common minke whale and the third smallest baleen whale. Although first scientifically described in the mid-19th century, it was not recognized ...
2 Answers
A whale’s blowhole is located on the top of their head. Whales have evolved from land-living mammals. As such, whales must breathe air regularly to survive, though they can remain submerged underwater for long periods of time.
Whale species such as the sperm whale are able to stay submerged underwater for as much as 90 minutes, though other whale species can only stay underwater ...
2 Answers
The fin on the back of whales are called dorsal fins. A dorsal fin is a fin located on the backs of various unrelated marine and freshwater vertebrates, including most fish, cetaceans (whales, dolphins, and porpoises), and the (extinct) ichthyosaurs. Depending on the species, an animal may have one or two of them.
Wildlife biologists often use the distinctive nicks and wear patterns ...
2 Answers
The answer is subsistence. As recently as 1988, humpback whales were listed as endangered by IUCN. Populations have now recovered, due to the introduction of commerical whaling bans. There are still concerns about apparently discrete and small subpopulations of humpback whales, including those in the Arabian Sea, the western North Pacific, the west coast of Africa, and the South Pacific ...
2 Answers
The three phyla of worms are flatworms, segmented worms and roundworms. Worms are many different distantly related animals that typically have a long cylindrical tube-like body and no limbs. Worms vary in size from microscopic to over 1 metre (3.3 ft) in length for marine polychaete worms (bristle worms),[1] 6.7 metres (22 ft) for the African giant earthworm, Microchaetus, and 58 metres (190 ...
2 Answers
Worms reproduce both asexually and sexually. Asexual reproduction is a type of reproduction by which offspring arise from a single organism, and inherit the genes of that parent only; it does not involve the fusion of gametes, and almost never changes the number of chromosomes. Asexual reproduction is the primary form of reproduction for single-celled organisms such as the Archaea and ...
1 Answer
The common name for Haemonchus is large stomach worm and barber pole worm. Haemonchus contortus, also known as the barber's pole worm, is very common parasite and one of the most pathogenic nematodes of ruminants. Adult worms attach to abomasal mucosa and feed on the blood. This parasite is responsible for anemia, oedema, and death of infected sheep and goats, mainly during summer in warm, ...
2 Answers
The common name for ostertagia is brown stomach worm. Ostertagia ostertagi, commonly known as the medium or brown stomach worm, is an important parasitic nematode (round worm) of cattle. O. ostertagi can also be found to a lesser extent in sheep, goats, wild ruminants and horses. The species causes ostertagiosis, which is potentially fatal in cattle.
It is found worldwide and is ...
2 Answers