Properties of Life
Living things are made of one or more of these basic units.
What are cells?
The smallest unit of matter that retains the properties of an element.
What is an atom?
Positively charged particles in the nucleus.
What are protons?
Bond formed by transfer of electrons between atoms.
What is an ionic bond?
Water’s partial charges make it this type of molecule.
What is polar?
The ability to keep internal conditions stable despite external changes.
What is homeostasis (regulation)?
Two or more atoms bonded together.
What is a molecule?
Negatively charged particles that move around the nucleus.
What are electrons?
Bond formed when atoms share electrons.
What is a covalent bond?
Attraction between water molecules that creates surface tension.
What is cohesion?
Using energy from food or sunlight to power metabolism.
What is energy processing?
Groups of similar cells working together.
What are tissues?
The atomic number is defined by the number of these particles.
What are protons?
Weak attraction between a slightly positive hydrogen and a slightly negative atom.
What is a hydrogen bond?
The four major biological macromolecules.
What are carbohydrates, lipids, proteins, and nucleic acids?
Changing over generations due to mutations and natural selection.
What is evolution?
All individuals of the same species living in one area.
What is a population?
Forms of the same element with different numbers of neutrons.
What are isotopes?
Unequal sharing of electrons results in this type of covalent bond.
What is a polar covalent bond?
Macromolecules that store long-term energy and are hydrophobic.
What are lipids?
This property explains why kittens inherit traits from their parents and develop according to genetic instructions.
What is growth and development?
All living organisms in an area plus nonliving components like water and soil.
What is an ecosystem?
An atom that has gained or lost electrons and now has a charge.
What is an ion?
Weak interactions caused by temporary partial charges between molecules.
What are van der Waals interactions?
Macromolecules made of amino acids that function as enzymes and hormones.
What are proteins?