Biology: Unity and Diversity

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What is the main focus of biology?

The study of unity and diversity of life

Which statement accurately describes the unity of all life forms?

They share a common heritage and genetic code

What is a key factor responsible for the diversity of living things?

Evolutionary forces shaping them differently over long periods of time

Which type of organisms are bacteria and Paramecium?

Unicellular

What distinguishes Paramecium from Bacteria?

Paramecium is larger and more complexed than Bacteria

What do all living things (organisms) have in common?

Similar chemical elements and laws of chemistry and physics

Which of the following is a characteristic shared by all living things?

Organization from atoms to the biosphere

What is the smallest structural and functional unit of all living things?

Molecule

Which sequence represents the correct order of classification categories from more inclusive to least inclusive?

Phylum, Kingdom, Domain, Genus

What is the hereditary characteristic where living things produce offspring that resemble themselves?

Heredity

Which category is the brain mainly made of?

Nervous tissue

What is the genetic material in living organisms made of?

DNA (Deoxyribonucleic acid)

What defines life by recognizing what living things do?

Definition of life

Which characteristic ensures that internal conditions in living things remain relatively stable?

'Homeostasis'

'Multicellular organisms have several cells of many types' exemplifies which level of biological organization?

'Organ'

'Living things share the characteristics of life, which differentiate them from non-living things' suggests that they are organized in a similar manner and have genes made of which material?

'DNA (Deoxyribonucleic acid)'

What is the main focus of biology?

Exploring the diversity and unity of life forms

What distinguishes Paramecium from Bacteria and other organisms mentioned?

Being unicellular and microscopic

What ensures that internal conditions in living things remain relatively stable?

Homeostasis

Which category primarily includes human beings as part of the diverse living world?

Multicellular organisms

What is responsible for the diversity of living things?

Evolutionary forces

'Bacteria and Paramecium are unicellular (microscopic), the others are multicellular' exemplifies which aspect of biology?

Cell theory

What is the genetic material in living organisms made of?

Deoxyribonucleic acid (DNA)

Which characteristic ensures that internal conditions in living things remain relatively stable?

Homeostasis

What distinguishes Paramecium from Bacteria?

Cell type

Which level of biological organization exemplifies the structure suitable for conducting a nerve impulse?

Cell

Which category is the brain mainly made of?

Tissue

What is the main focus of biology?

Studying life and living organisms

'Multicellular organisms have several cells of many types' exemplifies which level of biological organization?

Organism

What defines life by recognizing what living things do?

Organization from atoms to the biosphere

What is a key factor responsible for the diversity of living things?

Adaptation

What do all living things (organisms) have in common?

All of the above

Study Notes

  • Biology is the scientific study of life in all its forms on Earth.
  • Unity: All life forms share a common heritage, a common chemistry, genetic code, and basic life processes.
  • Diversity: Living things come in many different forms and functions, shaped by evolution over long periods.
  • Human beings are a part of the diverse living world.
  • Unicellular organisms, like bacteria and Paramecium, are microscopic and simple, while multicellular organisms are complex and larger.
  • Prokaryotes, like bacteria, have no nucleus, while eukaryotes have a nucleus and are more complex.
  • Plants are photosynthetic and make their own food, while others do not.
  • Definition of life: Organized from atoms to the biosphere, acquire materials and energy, grow and develop, reproduce, are homeostatic, respond to stimuli, and have adaptation.
  • Organization of living systems begins with atoms, which make up molecules, and the cell is the smallest structural and functional unit.
  • Multicellular organisms have multiple cells and tissues, which form organs and organ systems.
  • Taxonomy is the science of classification to group organisms into categories from larger (more inclusive) to smaller (least inclusive) categories: Domain, Kingdom, Phylum, Class, Order, Family, Genus, and Species.

Explore the concepts of unity and diversity in biology, as all life forms share a common heritage and genetic code, while also displaying a wide array of characteristics shaped by evolution. Learn about the common ancestry and the diverse forms of life through this quiz.

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