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Bella S1
S1 Reproduction
| Question | Answer |
|---|---|
| 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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