What is Biology?
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What is Biology?

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Questions and Answers

Which of the following branches of biology focuses on the study of the interactions between organisms and their environment?

  • Zoology
  • Genetics
  • Ecology (correct)
  • Botany
  • What is the primary function of the cell membrane?

  • Storing genetic information
  • Synthesizing proteins
  • Producing energy for the cell
  • Regulating the passage of substances into and out of the cell (correct)
  • Which of the following is NOT a characteristic of life?

  • Organization
  • Growth and Development
  • Movement (correct)
  • Reproduction
  • What is the process by which individuals with advantageous traits are more likely to survive and reproduce called?

    <p>Natural Selection</p> Signup and view all the answers

    What is the study of heredity and variation called?

    <p>Genetics</p> Signup and view all the answers

    Which of these processes is responsible for the formation of gametes (sperm and egg cells)?

    <p>Meiosis</p> Signup and view all the answers

    What is the process called where new species emerge from existing ones?

    <p>Speciation</p> Signup and view all the answers

    Which of the following is NOT a branch of biology?

    <p>Astronomy</p> Signup and view all the answers

    Study Notes

    Biology Definition

    • Biology is the scientific study of life and living organisms, including their structure, function, growth, evolution, and interactions with the environment.

    Branches of Biology

    • Botany: study of plants
    • Zoology: study of animals
    • Microbiology: study of microorganisms (bacteria, viruses, etc.)
    • Ecology: study of interactions between organisms and their environment
    • Genetics: study of heredity and variation
    • Biochemistry: study of chemical processes in living organisms
    • Molecular Biology: study of biological molecules and their interactions

    Characteristics of Life

    • Organization: living organisms are composed of cells, tissues, and organs
    • Metabolism: living organisms carry out chemical reactions to sustain life
    • Homeostasis: living organisms maintain a stable internal environment
    • Growth and Development: living organisms increase in size and complexity
    • Reproduction: living organisms produce offspring
    • Response to Stimuli: living organisms react to changes in their environment
    • Evolution: living organisms change over time through genetic variation and natural selection

    Cellular Biology

    • Cell Structure: cells are the basic units of life, consisting of a nucleus, cytoplasm, and cell membrane
    • Cell Functions: cells perform functions such as metabolism, growth, and reproduction
    • Cell Division: cells divide through mitosis (growth and repair) or meiosis (gamete formation)

    Evolutionary Biology

    • Theory of Evolution: all living organisms share a common ancestor and have evolved over time through natural selection and genetic variation
    • Natural Selection: process by which individuals with favorable traits are more likely to survive and reproduce
    • Speciation: process by which new species emerge from existing ones

    Biology Definition

    • Scientific study focusing on life and living organisms.
    • Encompasses structure, function, growth, evolution, and environmental interactions.

    Branches of Biology

    • Botany: Examines plant life, including physiology, structure, and distribution.
    • Zoology: Focuses on the biology of animals, including behavior and classification.
    • Microbiology: Investigates microorganisms like bacteria and viruses, their roles, and impact.
    • Ecology: Studies how organisms interact within their ecosystems and the environment.
    • Genetics: Explores heredity, variation, and the molecular basis of genetic traits.
    • Biochemistry: Analyzes chemical processes within and related to living organisms.
    • Molecular Biology: Looks at biological molecule interactions, including DNA, RNA, and proteins.

    Characteristics of Life

    • Organization: Composed of cells, forming tissues and organs, demonstrating structural complexity.
    • Metabolism: Chemical reactions that convert food into energy necessary for life.
    • Homeostasis: Regulation of internal environments to maintain stable conditions despite external changes.
    • Growth and Development: Progression from simpler to more complex forms, involving size and functional increase.
    • Reproduction: Ability of organisms to produce offspring, ensuring species continuity.
    • Response to Stimuli: Ability to react to environmental changes, critical for survival.
    • Evolution: Genetic changes over time lead to adaptation and species diversity through natural selection.

    Cellular Biology

    • Cell Structure: Fundamental life units comprising nucleus, cytoplasm, and cell membrane.
    • Cell Functions: Carry out life processes, including metabolism, production, and growth.
    • Cell Division: Mitosis for somatic cell growth and repair; meiosis for gamete production leading to sexual reproduction.

    Evolutionary Biology

    • Theory of Evolution: All species share a common ancestry, evolving through mechanisms such as natural selection.
    • Natural Selection: Survival and reproduction of individuals best suited to their environment based on advantageous traits.
    • Speciation: Formation of new species from existing species due to evolutionary processes and genetic divergence.

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    Description

    This quiz covers the definition and branches of biology, including botany, zoology, microbiology, ecology, genetics, and biochemistry.

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