Learning Objectives

• Describe how animals attract mates and protect their young through different courtship behaviors.

• Explain how genes and the environment affect how animals grow and develop.

• Describe the jobs of cell parts and find differences between plant and animal cells.

• Explain how cells form tissues and organs that work together in systems.

Key Vocabulary

Behavior

Behavior is the way an organism reacts to different stimuli within its surrounding environment.

Courtship Behavior

Courtship behavior involves special displays or actions animals use to attract a suitable mate for reproduction.

Pheromones

Pheromones are special chemicals released by an animal that can affect the behavior of others.

Innate Behavior

Innate behavior is a type of behavior that an animal inherits genetically from its parents.

Learned Behavior

Learned behavior is a type of behavior that an animal develops through its own experiences.

Genetic Factors

Genetic factors are the specific traits an organism inherits from its parents through their genes.

Key Vocabulary

Environmental Factors

These are the external conditions, such as sunlight and water, that can influence an organism's growth.

Cell Membrane

This thin layer acts as a boundary, controlling everything that enters and leaves the cell.

Nucleus

Known as the control center of the cell, it directs all cellular activities and functions.

Mitochondria

These are the powerhouses of the cell, providing the necessary energy for all cell functions.

Tissue

A tissue is a large group of similar cells that all work together to perform a specific job.

Organ

An organ is a structure made of different types of tissues that work together to do a job.

How Animals Attract a Mate

• Animals use courtship behaviors to communicate their interest in finding a mate.

• ​Visual displays, like a peacock’s feathers, are used to attract female attention.

• Sounds and chemical signals, called pheromones, help different animals attract their mates.

• Some animals, like mule deer, will compete with one another for mates.

Innate vs. Learned Behaviors

Innate Behaviors

• Animals are born with innate behaviors, which are natural instincts they do not need to learn.

• For example, a spider instinctively knows how to spin a web without ever being taught.

• Many animals also instinctively build nests or dens to keep their young safe from harm.

Learned Behaviors

• Learned behaviors are skills that an animal develops through experience, observation, or practice.

• For instance, a young bird learns how to fly by watching its parents and practicing.

• Some animals learn to work in groups, like herding, to protect their young from predators.

The Cell: The Basic Unit of Life

Animal Cells

• All animals are made of cells, which are the basic building blocks of life.

• The cell membrane controls what goes in and out, acting like a gatekeeper.

• The nucleus is the cell's control center, and mitochondria are the powerhouses.

Plant Cells

• Plant cells have a strong, rigid cell wall that provides structure and support.

• They have chloroplasts, which allow the plant to make its own food.

• Like animal cells, they have a nucleus, mitochondria, and a cell membrane.

How the Body is Organized

• In animals, specialized cells group together to form different types of tissues.

• Tissues, like muscle or nervous tissue, combine to create a larger organ.

• The heart is an organ made of muscle, connective, and nervous tissues.

• Organs collaborate in organ systems to carry out complex functions for survival.

Factors Influencing Animal Growth

Genetic Factors

• Genes from parents determine many of an animal's initial traits and characteristics.

• These inherited factors establish an animal's baseline features, such as its fur type.

• For example, whether a dog has straight or curly fur is decided by genetics.

Environmental Factors

• An animal's surroundings and experiences also play a big role in its development.

• This includes its diet, amount of exercise, and interactions with other animals.

• A dog’s behavior and obedience are shaped by its training and daily environment.

Common Misconceptions

Summary

• Animals use courtship behaviors like displays, sounds, and chemicals to attract mates.

• Innate and learned behaviors help animals protect and raise their young.

• Cells form tissues, tissues form organs, and organs form systems for life functions.

• An animal's growth is shaped by its genetic and environmental factors.