SME
Grade 9 Science · Biology
Reproduction and development
Put the stages of animal development in order, from fertilization to the forming of tissues and organs.
Put in order
Put the stages of animal development in order, from fertilization.
1
?
2
?
3
?
4
?
5
?
6
?
Assumptions
•
An egg and a sperm are haploid; together they make a diploid zygote, which divides by mitosis.
•
Every cell has the same DNA, but different cells turn on different genes: they differentiate.
Topic check
See what you know: 5 questions on this topic
New questions each time. Pass to mark it complete.
Refresh
More problem types
Sexual or asexual reproduction?
Use this for “Why do offspring from sexual reproduction differ from both parents?”
Which germ layer forms it?
Use this for “Which germ layer forms the brain and spinal cord?”
The menstrual cycle
Use this for “Why does menstruation stop during pregnancy?”
Hormone levels through a cycle
Use this for “Which hormone keeps the uterine lining in the second half of the cycle?”