Sexual reproduction Flashcards
Name the outermost whorl of the flower.
Sepal - protects the rest of the flower.
Name the whorl that secretes nectar.
Petals
Name the male whorl.
Stamen - made of anther and filament and contains pollen.
Name the inner female whorl.
Pistil - made of ovary, style and stigma
Distinguish between bisexual and unisexual flowers
Bi - contain male and female structures
Uni - Contain either male or female structures
Name the four dispersal mechanisms of seeds
Wind
Water
Self-dispersal (dry up and burst out)
Humans and animals
Why are sees often not dispersed far from the parent plant?
It increases the chance of survival
Define puberty
The stage of human development when the body changes from a child to an adult.
What is the purpose of puberty
Allows the person to reproduce
What are hormones?
Chemicals that regulate activity of cells or organs
What is menstration?
Monthly bleeding from the vagina caused by the shedding of the lining of the uterus.
Name the key body changes experienced by a male during puberty
facial hair deeper voice muscle growth hair on underarms and body penis enlarges and pubic hair
Name the key body changes experienced by a female during puberty
underarm hair breast enlargement wider hips ovulation and menstration start pubic hair grows
Where are the egg cells stored in a female’s body?
In her ovaries
What is ovulation?
The release of egg/s (ovum) every 28 days
Where is sperm made in a male’s body
testes
What is the more common name for menstration?
period
When does ovulation normally occur during the menstrual cycle?
Around day 14
At what stages during the mentrual cycle can a female fall pregnant?
During ovulation i.e. from when the eggs are released and the few days after that until they die.
What is the name given to the process of the sperm cell and the ovum fusing?
fertilisation
Where do the sperm and egg fuse
Fallopian tube
What are the common ways of preventing pregnancy?
Abstinence (not having sex)
Contraceptives (pill, condoms etc)
How can you prevent STDs (sexually transmitted diseases)
Abstinence (not having sex)
Using a condom correctly
