Definitions
Define gestation
The length of time between the fertilization of an egg cell and birth of an animal
What is the point of the phases?
The point of the four phases are about the baby and how it develops
Embryos that develop inside of the animal is part of which development?
Internal Development
Internal development occurs for almost all mammals except platy pi and some anteaters
True
Define sexual reproduction
The genetic material from two different cells produce on offspring
Define metamorphis
A developmental process where the form of the body changes as an animal goes from an egg to an adult
What is phase 1?
Phase one is the egg
During development stages, the zygote begins to develop into what after fertilization?
An embryo
The embryo gets nourishment from their mom and dad
False, the embryo gets nourishment from organs and tissues of the mother
Define courtships
Courtship is specialized behavior that is meant to help animals find and attract a mate
Define mitosis
Cellular division
What is phase 2?
Phase two is when the larva forms. This is the pre-adult phase where a newly hatched animal grows and develops
Daughter cells are created by what
Parents cells
Eggs laid by birds have a softer covering
False, eggs laid by birds have a harder covering
Define offspring
An offspring is a child
Define fertilization
The joining of n egg cell with a sperm cell
What is phrase 3?
Phase three is when the pupa comes in. This is an inactive phase here larva just starts to transform into an adult
Some animals that use external fertilization are:
Sea urchins, fish, sea stars, jellyfish, clams, and in general amphibians
Eggs laid on land often have a jelly-like covering
False, eggs laid underwater often have a jelly-like covering
Define external fertilization
External fertilization is the release of both sperms and eggs into an external environment
Define zygote
The new cell that is formed after an egg cell is fertilized
What is phase 4?
Phase four is the last phase which is where it is a full grown adult
What does an egg need when going through internal development?
Food and nourishment
A yolk provides the embryo with food
True
Define internal fertilization
Internal fertilization is the union of an egg and sperm cell during sexual reproduction inside the female body