Characteristics of Life Quiz

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Questions and Answers

What are the six characteristics of life mentioned in the text?

Movement, response to environment, growth & development, metabolism, adaptation & evolution, reproduction

Give an example of an organism responding to its environment.

Sunflowers following the sun

Explain the concept of maintaining homeostasis.

Maintaining a stable internal environment by responding to external changes.

What is the role of DNA in living organisms?

Contains hereditary material and genetic information. Signup and view all the answers

Differentiate between asexual and sexual reproduction.

Asexual reproduction results in an exact copy, while sexual reproduction involves the crossing of genes. Signup and view all the answers

What is cellular organization, and how does it vary in living organisms?

Cellular organization refers to the structure of organisms at a cellular level. It can be unicellular (e.g., bacteria) or multicellular (e.g., plants). Signup and view all the answers

What is binomial nomenclature and how is it structured?

Binomial nomenclature is the formal system of naming species whereby each species is assigned a genus name followed by a specific name. The genus name begins with a capital letter and both parts of the name are italicized or underlined. Signup and view all the answers

Explain the concept of dichotomous keys and what they are used for.

Dichotomous keys are a structure where a large set of items are broken down into smaller subsets, ultimately leading to the smallest available classification unit. They are used for identifying organisms based on a series of choices between alternative characters. Signup and view all the answers

What is the study of phylogeny and how is it represented?

Phylogeny is the study of evolutionary relations between and among species. It is visually represented by a phylogenetic tree, which is a branching diagram used to show evolutionary relationships between different species or groups. Signup and view all the answers

Define a clade and its significance in taxonomy.

A clade is a taxonomic group that includes a single common ancestor and all its descendants. In taxonomy, clades are used to show evolutionary relatedness among species and are depicted in phylogenetic trees. Signup and view all the answers

Explain the importance of prokaryotes in ecosystems.

Prokaryotes play essential roles in ecosystems by fixing nitrogen, producing oxygen, and forming mutualistic relationships. They are crucial for nutrient cycles and have commercial uses in industries like food production. Signup and view all the answers

What is a plasmid and where is it commonly found?

A plasmid is a small loop of DNA often found in prokaryotic cells. It contains a few genes that can provide advantages for the cell, such as antibiotic resistance or the ability to produce certain proteins. Signup and view all the answers

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