16 Questions
What is the process that makes more of the same kind of organism?
Growth
Which characteristic refers to the ability to detect and respond to changes in the internal or external environment?
Sensitivity
What are the chemical reactions in cells that break down nutrient molecules and release energy for metabolism called?
Respiration
Which process involves the removal of the waste products of metabolism and substances in excess of requirements?
Excretion
What is the internationally agreed system for naming organisms comprising two parts showing the genus and species?
Binomial System of Naming Species
What kind of group are species, in terms of their ability to reproduce and produce fertile offspring?
Species
What is the correct format for writing the scientific name of an organism?
Genus Species
How do scientists use DNA base sequence to classify organisms?
By determining the similarity in DNA chains
What do dichotomous keys use to classify organisms?
Visible features
Which kingdom includes multicellular photosynthetic autotrophic organisms with a cellulose cell wall and chloroplasts?
Plants
What is a common feature of vertebrate mammals?
External ears (pinna)
Which group of organisms are not part of any classification system?
Viruses
What do arthropods have in common?
Jointed legs and an exoskeleton
What is the defining characteristic of birds among vertebrates?
Feathers on body and scales on legs
What is a common feature of reptiles among vertebrates?
Thick, dry, scaly skin
What is a feature common to all animals?
Only feed on organic substances made by other living things
Study Notes
Biological Processes
- Reproduction is the process that makes more of the same kind of organism.
Characteristics of Life
- Irritability refers to the ability to detect and respond to changes in the internal or external environment.
Cellular Metabolism
- Cellular respiration is the set of chemical reactions in cells that break down nutrient molecules and release energy for metabolism.
Excretion
- Excretion is the process that involves the removal of the waste products of metabolism and substances in excess of requirements.
Taxonomy
- Binomial nomenclature is the internationally agreed system for naming organisms, comprising two parts showing the genus and species.
- Species are a group of organisms that can reproduce and produce fertile offspring.
- The scientific name of an organism should be written in italic font, with the genus name capitalized and the species name not capitalized.
Classification of Organisms
- Scientists use DNA base sequence to classify organisms by comparing their genetic similarity.
- Dichotomous keys use a series of characteristics to classify organisms into different groups.
Kingdoms of Life
- Plantae includes multicellular photosynthetic autotrophic organisms with a cellulose cell wall and chloroplasts.
Characteristics of Vertebrates
- Vertebrate mammals have mammary glands, which is a common feature among them.
- Prions are not part of any classification system.
- Arthropods have jointed limbs, a hard outer shell, and segmented bodies, which are common features among them.
- Birds are characterized by the presence of feathers among vertebrates.
- Reptiles are characterized by scaly skin among vertebrates.
- Responsiveness to stimuli is a feature common to all animals.
Test your knowledge on the characteristics and classification of living organisms in the CAIE IGCSE Biology syllabus. This quiz covers topics such as movement, respiration, sensitivity, and more.
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