PPT 1

Flashcards covering key vocabulary related to cell biology and characteristics of living organisms.

Characteristics of Living Things

The common attributes that all living organisms share: Movement, Respiration, Sensitivity, Excretion, Growth, Nutrition, Reproduction.

Movement

An action by an organism or a part of an organism causing a change of position or place.

Respiration

The chemical reactions in cells that break down nutrient molecules and release energy for metabolism.

Sensitivity

The ability to detect and respond to changes in the internal or external environment.

Excretion

The removal of waste products of metabolism and substances in excess of requirements.

Growth

A permanent increase in size and dry mass by an increase in cell number.

Nutrition

The taking in of materials for energy, growth, and development.

Reproduction

The processes that result in the production of more individuals of the same kind of organism.

Fertilization

The process where an egg and sperm unite to form a zygote.

Zygote

The fertilized egg that contains 46 chromosomes in 23 pairs.

Binary Fission

A type of asexual reproduction in which a parent bacterial cell divides into two genetically identical daughter cells.

Embryo

A developmental stage following the zygote, containing 46 chromosomes in 23 pairs.