Edited Invalid date
Some species change their sex during their lives.
Oysters are born male, grow and become female and lay eggs, but some species change sex multiple times.
A sperm and an egg are combined in a fertilization process.
Humans provide an example of the former while seahorse reproduction is an example of the latter.
Eggs and sperm are released into the water for external fertilization.
fertilization takes place after the sperm reaches the egg During the process of spawning, one or several females release their eggs and the male releases sperm in the same area, at the same time.
Water temperature or the length of daylight can cause the release of reproductive material.
During sexual reproduction in toads, the male grasps the female from behind and fertilizes the eggs as they are deposited.
Pairs of fish that are not broadcast are more likely to be interested in each other.
The female can choose a male.
The egg and sperm can be placed in a small area to increase the chance of fertilization.
Eggs are protected from drying out by external fertilization.
A greater mixture of genes within a group can lead to higher genetic diversity and a better chance of survival in a hostile environment.
Broadcasting spawning is the only way for sponges to grow in new environments.
The presence of fertilized eggs and young in the water can lead to a loss of offspring.
Millions of eggs must be produced by individuals, and the offspring produced through this method must mature quickly.
The survival rate of eggs is low.
Most land-based animals use internal fertilization.
There are three ways in which offspring are produced.
This occurs in a lot of fish, lizards, mammals, and birds.
Birds and turtles produce eggs with high concentrations of calcium carbonate in the shell, making them hard.
Chicken eggs are an example of this type.
This happens in some fish, sharks, lizards, snakes, and other animals.
The offspring is born alive.
This happens in mammals, some fish, and a few lizards.
The advantage of internal fertilization is that it protects the fertilized egg from dehydration.
The embryo is isolated from the young so they can't see it.
Eggs are fertilized by a specific male.
The survival rate is higher for offspring produced through this method.
Some tissues and organs were developed after multicellular organisms evolved and developed specialized cells.
The Annelids had an early development in reproduction.
Review flashcards and saved quizzes
Getting your flashcards
Privacy & Terms