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- Backbone
- Hair
- Young alive
- Nurse the young
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What are the 4 traditional methods to classify organisms?
Whereas previously classification was based on homologies, that is the shared characteristics from common ancestors, modern classification is based on the following four methods:symmetrymorphologygerm layersembryonic development
How many chambers are there in the heart of a whales?
Four.
What appendage does the skeleton of a whales fin resemble?
On the outside, the fins of a whale resemble the fins of a fish, because they have evolved for the same purpose. But when you look at a whale skeleton, the fins look like arms and hands. That's because whales are not fish, they are actually mammals that have evolved from land-dwelling creatures with four legs.
How do the fossils of whales provide evidence that whales have evolved over millions of years?
i guess they show tht whales were here millions of years ago and they show how they changed over time, when the whales changed or evovled, the fossils changed they show that whales' ancestors were four legged mammals. modern whales inherited hip bones from their four legged ancestors.
Why is the four chamber heart a poor choice of structure to place creatures on a phylogenic tree?
All birds and mammals have a four chambered heart.
What are the four main elements in the ocean?
Fish, rocks , Mammals such as whales ,and crabs.
Is there a fish that are mammals?
No fish are mammals. Mammals are vertebrate animals that nurse their young. Mammals have many characteristics in common such as being warm-blooded, having some hair or fur, and being tetrapods (having four limbs, although in marine mammals these are fins).
If an animal does not have four legs can it be a mammal?
Not all mammals have four legs. Bats are mammals, but have only two "legs." Whales and dolphins are mammals, but have no legs at all. What distinguishes mammals from other animals is not the number of legs, but the presence of sweat and milk glands.
What are four characteristics that can be used to classify a rock?
Density, crystallography, mineralogy, method of formation, chemistry, texture, hardness, and others.
How many eggs do whales have?
Whales do not lay eggs, they give birth to live young.
What characteristics help you classify a quadrilateral as a parallelogram and not a triangle?
Triangles have only three sides; all quadrilaterals, including parallelograms, have four.
What mammals are in the family of whales?
Whales looks like fishes. They can swim in water like them but they are not fish as they respire with lugs, have four chambered heart, diaphragm, mammary gland, hairs, etc. Whales are viviparous like any other mammal.
Are whales fish?
No. Whales must to breathe air - they do not have gills and can not breathe underwater. Also, they are mammals, giving birth to live off-spring and suckling them.An easy way to distinguish most marine mammals from fish is the angle of the tail - mammals have it horizontal and fish (including sharks) have a vertical tail fin.No, whales are mammals, like dolphins. An easy way to tell is if something swims with it's tail moving side to side, it is a fish. If the tail moves up and down, it is a mammal. A whale is a mammal, it gives birth to live young and has to rise to the surface to breathe. its whale and no whales are mammals
What are the mammals with 4 legs?
All mammals have four legs, or at least four limbs if they're bipedal such as us, or in the case of bats. Whales have vestigial hind legs, in the form of a pelvis hidden halfway down their tail, and the flippers are their front legs. In fact, all land vertebrates (amphibians, reptiles, mammals, birds) have four limbs. ^^
What are four factors used to classify soil?
what are four main soils used to classify soils
What are hidden characteristics of an animal?
Every organism needs to have characteristics to make them who they are...the 6 characteristics of an animal is: 1) Reproduce sexually 2) Have specialized parts 3)Are multicellular 4)Are consumers 5)Develp from embryos
What characteristics is common in all vertebrates?
There are many such features, including: 1. Mammals nourish their young with milk. 2. Mammals are warm-blooded. 3. Mammals have fur. 4. Mammals have a four-chambered heart. 5. Mammals are amniotes. 6. Mammals breathe oxygen. 7. Mammals have three middle ear bones and a neocortex. 8. Mammals have internal reproduction. Some of these characteristics are unique to mammals; others are found in some other vertebrates but not in all other vertebrates.
