Life's Structure and Classification

A(n) ___ is the smallest unit of an organism that carries out the function of life.

• atom
• molecule
• cell
• tissue

All living things must maintain ___, which is the balance of all their internal conditions.

• homeostasis
• stimuli
• space
• reproduction

Ambystoma tigrinum is an example of ____.

• domain name
• binomial nomenclature
• modern classification
• phylogeny

An organism being sorted according to its evolutionary history is an example of ___.

• domain
• species
• binomial nomenclature
• phylogeny

In plant cells, organelles called ___ make food.

• chlorophyll
• chloroplasts
• endoplasmic reticulum
• ribosome

Many field guides have ____ to help you identify organisms.

• dichotomous key
• domain charts
• nomenclature descriptions
• kindom classification

The invention of the microscope by ___ made it possible for scientists to look at cells. 

• van Leeuwenhoek
• Hooke
• Virchow
• Jenner

All ___ cells have membrane-bound organelles to carry out life processes.

• prokaryotic
• eukaryotic
• virus
• bacteria

Using ___, scientists hope to use viruses to spread new genetic material to cells. 

• antiviral medications
• vaccinations
• interferon injections
• gene therapy

Yellow fever, rabies, chicken pox, and HIV are all ___.

• bacterial infections
• yeast infections
• viruses
• curable