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Where is biology useful?
Health care, agriculture and food sciences, public health engineering, and aerospace engineering.

Human beings are studies under the pretext of medicine or health care.

What is Biology?
Biology is the study of living things and their vital processes. Because biology covers such a broad area, it has been traditional to separate the study of plants (botany) from that of animals (zoology), and the study of structure of organisms (morphology) from that of function (physiology). Despite their apparent differences, all the subdivisions are interrelated by basic principles, so current practice tends to investigate those biological phenomena that all living things have in common. The advancement of knowledge and technology has resulted in further categorizations that include, but are far from restricted to: cell biology, population biology, ecology, genetics, biochemistry, molecular biology, microbiology, and physical anthropology.

What is a living thing?
Living things are made of cells.
Living things obtain and use energy.
Living things grow and develop.
Living things reproduce.
Living things respond to their environment.

What are the five kingdoms into which living beings are divided? Which group of living being is out of this classification?
The five kingdoms of living beings are the kingdom Monera, the kingdom Protista, the kingdom Fungi, the kingdom Plantae and the kingdom Animalia.

Kingdom Monera
Kingdom Protista
Kingdom Fungi
Kingdom Plantae
Kingdom Animalia
Viruses are out of this classification and sometimes they are said to belong to their own kingdom, the kingdom Virus.

Which are the beings that constitute the kingdom Monera?
The kingdom Monera is the kingdom of the prokaryotes, composed of bacteria and archaebacteria.

Which are the beings that form the kingdom Protista?
The kingdom Protista comprises protozoans and algae.

Which are the beings that form the kingdom Fungi?
The kingdom Fungi is formed by fungi.

Which are the beings that form the kingdom Plantae? Are algae part of this kingdom?
The kingdom Plantae is composed of plants.
Algae are classified into the kingdom Protista and not into the kingdom Plantae (they are not plants).

Which are the beings that form the kingdom Animalia? What are the two big groups into which this kingdom is divided?
The kingdom Animalia is the animal kingdom. Commonly the kingdom Animalia is subdivided into invertebrates and vertebrates.

What are the nine phyla of the kingdom Animalia?
The nine phyla of the animal kingdom are: Porifera (poriferans), Cnidaria (cnidarians), Platyhelminthes (flatworms), Nematoda (roundworms), Annelida (annelids), Mollusca (molluscs), Arthropoda (arthropods), Echinodermata (echinoderms) and Chordata (chordates).

What are the two mains divisions of the chordate phylum?
Chordates are divided into protochordates (cephalochordates and urochordates) and vertebrates.

What are the differences between vertebrates and the other chordates?
Vertebrates are different because they have a spinal column (vertebral column). In these animals the notochord of the embryonic stage is substituted by the vertebral column in adults.

What are the five classes of vertebrates? To which of these do human beings belong?
The five classes of vertebrates are: fishes (osteichthyes and chondrichthyes), amphibians, reptiles, birds and mammals. Humans classify as mammals.

How do you find out the number of chromosomes of an animal?
Here are further guidelines.