Biology Classification and Cell Functions

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What is a species?

A species is a group of populations that can freely interbreed and produce fertile offspring, but are reproductively isolated from other groups.

Why is classification important for understanding organisms?

Classification helps organize dissimilar forms of life into meaningful groups based on evolutionary relationships and shared traits.

What criteria are used in the classification of organisms?

Classification is based on homologies, comparative biochemistry, cytology, and genetics.

How are living things primarily divided?

Living things are primarily divided into two kingdoms: plants and animals. Signup and view all the answers

What does it mean that species are considered independent evolutionary units?

It means that species do not exchange genes and have unique structural, ecological, and behavioral characteristics. Signup and view all the answers

What is the primary function of mitochondria in a cell?

Mitochondria primarily function as the powerhouse of the cell, generating ATP through cellular respiration. Signup and view all the answers

Describe the role of enzymes in biochemical reactions.

Enzymes act as catalysts that speed up biochemical reactions by lowering the activation energy required. Signup and view all the answers

What is the significance of the cell membrane's selective permeability?

The selective permeability of the cell membrane allows the cell to maintain homeostasis by controlling the movement of substances in and out. Signup and view all the answers

Identify the structural difference between DNA and RNA.

DNA is double-stranded and contains deoxyribose sugar, while RNA is single-stranded and contains ribose sugar. Signup and view all the answers

How do photosynthesis and cellular respiration relate to each other?

Photosynthesis converts solar energy into chemical energy stored in glucose, while cellular respiration breaks down glucose to release that energy. Signup and view all the answers

Species Classification

A system for organizing species based on evolutionary relationships and shared traits.

Homologies

Similarities in structure or development of organisms reflecting shared ancestry.

Species

A group of populations whose members can interbreed and produce fertile offspring, isolated from other groups.