Waters, as well. Whales are found in open seas throughout the world and occasionally in coastal certain species migrate, while others remain year-round in the same habitats. The skin of whales is usually black, gray, black, tan and white, or all white. Their skin texture is smooth, but like other mammals, whales have hair at some point in their development. In adults it's usually found only in the head area, and in some species only in the fetus. Whales store energy in an under skin layer of fat, or blubber. The ability to store "fuel" in the form of blubber helps whales survive during long periods of starvation. Except for having horizontal tails that move up and down, rather than side-to-side, whales have the general shape of fish, though in certain species the head is greatly enlarged. Over millions of years, hind limbs have vanished but shortened forelimbs remain. Whales breathe through lungs, with some large species remaining under water for as long as two hours. Whales are not fish. They are mammals. A mammal is an animal that has lungs and breathes air. They also have hair on their bodies. Whales are sea mammals that live in the sea. Whales give birth to babies. They are called calves. The females are called cows, and males are called bulls. The calves do not have any blubber. Blubber is a thick layer of fat under the skin. Dolphins are whales. They enjoy frolicking near ships at sea. A whale breathes through its blowhole. When it sleeps, it closes its blowhole very tightly. It is almost like it is holding its breath.
Luster and composition are two characteristics used to classify minerals.
size and shape
size
you classify stars by color, temperature, size, composition, and brightness.
maritime and continental.
.All of the following are used to classify organisms into domains and kingdoms EXCEPT ____.Color of body
they use genus and dichotomous keys
temperature and mostiure
blood brain musscle
BackboneHairYoung aliveNurse the young
botanist who proposed classifying plants using many characteristics
The seven level system