1. Subatomic particles include electrons, the negatively charged, almost massless particles that nevertheless account for most of the size of the atom, and they include the heavier building blocks of the small but very dense nucleus of the atom, the positively charged protons and the electrically neutral neutrons.
2. The element helium, for example, contains atoms with two protons in the nucleus. The element iron contains atoms with 26 protons. The element oxygen contains atoms with eight protons. And the element gold contains atoms with 79 protons.
3. Molecules of compounds have atoms of two or more different elements. For example, water (H2O) has three atoms, two hydrogen (H) atoms and one oxygen (O) atom. Methane (CH4), a common greenhouse gas, has five atoms, one of carbon (C) and four of hydrogen (H, see Fig. 2.9).
4. Examples of membrane-bound organelles are nucleus, endoplasmic reticulum, Golgi apparatus, mitochondria, plastids, lysosomes and vacuoles.
5. Trees in a forest, fish in a river, horseflies on a farm, lemurs in the jungle, reeds in a pond, worms in the soil — all these plants and animals are made of the building blocks we call cells. Like these examples, many living things consist of vast numbers of cells working in concert with one another.
6. Biology definition: A tissue is an aggregate of cells in an organism that have similar structure and function. ... Examples of plant tissues are meristematic tissues and vascular tissues. Examples of animal tissues are epithelial tissues, connective tissues, muscular tissues, and nervous tissues.
7. In biology, an organ (from the Latin "organum" meaning an instrument or tool) is a collection of tissues that structurally form a functional unit specialized to perform a particular function. Your heart, kidneys, and lungs are examples of organs.
8. An organ system is a group of organs that work together to perform a certain function in an organism's body. ... An example of an organ system is the circulatory system, which includes the heart, arteries, veins, and capillaries.
9. An example of an organism is a dog, person or bacteria. ... An individual form of life, such as a bacterium, protist, fungus, plant, or animal, composed of a single cell or a complex of cells in which organelles or organs work together to carry out the various processes of life.
10. Frequency: Population is the number of people or animals in a particular place. An example of population is over eight million people living in New York City.
11. The definition of community is all the people living in an area or a group or groups of people who share common interests. An example of community is a group of Buddhists who meet and chant together.
12. Examples of ecosystems are: agroecosystem, aquatic ecosystem, coral reef, desert, forest, human ecosystem, littoral zone, marine ecosystem, prairie, rainforest, savanna, steppe, taiga, tundra, urban ecosystem and others. plants, animals, soil organisms and climatic conditions.
13. Terrestrial biomes or land biomes – e.g. tundra, taiga, grasslands, savannas, deserts, tropical forests, etc. Freshwater biomes – e.g. large lakes, polar freshwaters, tropical coastal rivers, river deltas, etc. Marine biomes – e.g. continental shelf, tropical coral, kelp forest, benthic zone, pelagic zone, etc.
14. The biosphere is defined as the area of the planet where organisms live, including the ground and the air. An example of the biosphere is where live occurs on, above and below the surface of Earth. ... The part of the earth and its atmosphere in which living organisms exist or that is capable of supporting life.
