Sponges are simple animals that either begin from parent budding or from parent reproduction. The sponge develops based ion the environment it is born into.
The basic kind of life cycle found in the simplest animals is very general. This basic lifestyle consists of birth, growing, and dying.
Live, eat, reproduce, die.
haploid
diploid
The simplest form of animal life is found in single-celled organisms, such as protists or bacteria. These organisms have basic structures and functions, without specialized tissues or organs. They rely on diffusion for nutrient exchange and do not exhibit complex behaviors like more advanced animals.
The basic two: the acquisition of foodstuffs and reproduction.
The basic two: the acquisition of foodstuffs and reproduction.
The basic two: the acquisition of foodstuffs and reproduction.
Monosaccharide is found in some plant forms and all animals. Monosaccharide is a simple sugar and the most basic form of carbohydrate.
Evolution of brain is called cephalization. Worms are found to have the simplest brain mechanism and have simple straight forward nervous system i-e head to tail.
The basic laws are found in the Animal Welfare Act, but each state also has the right to enact it's own laws governing animal welfare within it's borders.
I haven't done any applied research with animal testing, although I have done basic research with them in the past. However, every drug and medication that is on the market today has had animal testing. Antibiotics, Pain Meds, Heart Meds, etc. Certainly animal research also includes basic research and not every test will result in a marketable drug.