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Bella S1

S1 Reproduction

QuestionAnswer
Why is an egg (ovum) bigger than a sperm Because it has a food store
How many structures in an animal cell? 3
How many structures in a plant cell? 6
What is the function of the cytoplasm? Site of chemical reactions
What is the function of the cell wall? Gives support to plant cells
What is the function of the vacuole? Stores cell sap
What is the function of the nucleus? Controls cell activities and stores DNA
What is the function of the cell membrane? Controls what exits and enters the cell
What is the function of the chloroplast? Site of photosynthesis
Name a specialised cell. Sperm, egg, nerve, muscle, root hair, pollen, red blood cell.
Why is a red blood cell specialised for its role? Has no nucleus so it can transport more oxygen
Why is a sperm cell specialised for its role? It has a tail so it can swim to an egg
Why is a egg cell specialised for its role? It has a food store to fuel cell division
Why is a pollen cell specialised for its role? It is spiky to attach to insects
Why is a Leaf cell specialised for its role? It ahs many chloroplasts for photosynthesis
Why is a nerve cell specialised for its role? It is very long to send nerve messages to other cells
Why is a root hair cell specialised for its role? It has hair like projections to absorb more water
Why is a muscle cell specialised for its role? It can contract to move bones
What do you call a group of cells that are similar and perform the same job? Tissue
Name a change that takes place in puberty that only affects boys. Voice breaking
Name a change that takes place in puberty that only affects girls. periods starting (menstruation)
Name a change that takes place in puberty that only affects both boys and girls. production of sex cells, growth spurt, acne, hair growing in new places.
Where are sperm produced in males? Testes
Where do babies grow in females? Uterus (womb)
Where does fertilisation take place in a female? Oviduct
Where are eggs produced in a female? Ovary
What is fertilisation? When the nucleus of the sperm fuses with the nucleus of the egg.
What is a fertilised egg called? Zygote
What is the role of the placenta? Allows the exchange of substances between mothers blood and babies blood.
Name a substance that is important for the baby that passes through the placenta from the mum's to the baby's blood. Oxygen, food
Name a substance that is important for the baby to get rid of that passes through the placenta from the baby to the mum's blood. carbon dioxide
Where in a flower is pollen produced? Anther
What part of the flower does pollen land on? Stigma
Where in a flower are eggs produced? Ovary
How does pollen get carried from one flower to another? Insects or wind
What grows from pollen to allow the nucleus to meet the egg? A pollen tube
What is germination? When seeds start to grow
What do seeds need to germinate Water, oxygen, warmth
How are dandelion seeds dispersed from their plant? Wind
How are coconut seeds dispersed from their plant? Water
How are squirting cucumber seeds dispersed from their plant? Explosion
How are burdock seeds dispersed from their plant? Attach to animal fur
How are tomato seeds dispersed from their plant? Eaten by animals
Created by: nscobie
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