Karteikarten
Biology - Photosynthesis - (Part II)
Karten in diesem Stapel (39)
- 1Why are leaves broad?So they have a big surface area for absorbing light.
- 2Chloroplasts are found where on a leaf? Why?CHLORPLASTS are found in cells near the top of the leaf
They can get most LIGHT. - 3To keep healthy, plants form food photosynthesis, but to keep healthy they also need ...
- 4What four things are needed for photosynthesis?Light,
carbon dioxide,
chlorophyll,
water - 5Describe 5 ways in which leaves are adapted for photosynthesis.- Broad, have large surface area
- Chloroplasts are found in cells near the top of the leaf
- The underside is covered in stomata
- There is air space between leaf cells
- They contain a network of veins - 6What part of the flower develops into the seed after fertilisation?The ovule
- 7Why do plants disperse their seeds?so they can grow into new plants without too much competition form each other.
- 8Name 4 things needed for seeds to grow into healthy plantssunlight
water
carbon dioxide
minerals / nutrients - 9suggest a reason why plants have bright yellow flowersto attract insects for pollination
- 10some plant seed heads have tiny hooks on the - how would the hooks help the plants to dispersethey hook onto the fur of animals
- 11Why do plants in full sunlight grow better than those growing under a tree.plants under a tree receive less water and light meaning they may not be able to photosynthesise as much as plants in sunlight
- 12if you planted some flowers in mineral rich compost and some in ordinary garden soil, Which might be healthier?mineral rich compost
plants need minerals to stay healthy - 13Which is true 1. Fertilisation in plants happens when pollen grain lands on the stigma 2. Fertilisation is when the nuclei for the ovule (egg) and male sex cell join togetherFertilisation is when the nuclei for the ovule (egg) and male sex cell join together
- 14—
- 15What is the function of the vascular bundleto transport water to the leaf and to take glucose from the leaf
- 16What is the function of palisade mesophyllabsorbs the maximum amount of light as possible
- 17Do root cells contain chloroplastsno because they are not exposed to sunlight
- 18What is the function of spongy mesophyllincreases the surface area for CO2 absorption and allows gases to diffuse
- 19What is carcinogenchemicals and other agents that can cause cancer
- 20What are stem cells?unspecialised cells that can produce many different types of cells
- 21What is the function of vascular bundles?They are veins that support the leaf and transport
- water to the leaf
- glucose away from the leaf - 22Name the upper epidermal tissues ADAPTATION and FUNCTION?ADAPTATION
thin, transparent waxy cuticle
FUNCTION
allows light to pass to the mesophyll to protect teh leaf and stop water loss - 23Name the palisade mesophyll ADAPTATION and FUNCTION?ADAPTATION
regular- shaped cells, arranged end-on, near upper surface; most chloroplasts at the top of the cells
FUNCTION
absorb maximum light - 24Name the ADAPTATION and FUNCTION of spongy mesophyllADAPTATION
irregular-shaped cells; many air spaces
FUNCTION
increases surface are for CO2 absorption, allows gases to diffuse
- 25Name the lower epidermal tissue ADAPTATION and FUNCTION?ADAPTATION
many stomata; surrounded by guard cells
FUNCTION
allow gases to diffuse; guard cells open and close stomata - 26Name the vascular bundles ADAPTATION and FUNCTION?ADAPTATION
contain xylem and phloem tubes
FUNCTION
transport substances around the plant - 27Name two limiting factors with photosynthesis and the growth of plantsCO2- when plants are crowded on a sunny day
Temperature - in cooler months
Light - at dawn - 28Why do farmers use greenhouses? name 3keeps them warmer and increases photosynthesis and plant growth.
conditions can be controlled.
protect plants from weather conditions and animals - 29Some plants are grown using HYDROPONICS, what is thisThe plants roots are grown in rock wool (a basalt-based medium) and nutrient-rich water
- 30Greenhouses optimise growth in plants by enabling 6 conditions, what are theycarbon dioxide
concentrations
light levels
water levels
temperature
nutrient availability - 31What are the biggest threats to crops in commercial greenhouses?viruses
- 32Diffusion is sometimes referred to aspassive transport
- 33What is equilibriumwhen movement of particles stops changing.
- 34Why are cell membranes very thinto allow substances to easily diffuse through them
- 35What are phloem'stubes that transport dissolved sugars made in the leaves around the plant
- 36What are guard cells?cells that open and close to control the exchange of gases and water loss
- 37What does a limiting factor affectthe rate of photosynthesis
- 38What is a lignina substance that is in the walls of xylem making them strong
- 39What is translocation?the movement of dissolved sugars around the plant
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- Biology (Bioenergetics) Karteikarten am Biology - Photosynthesis - (Part II), erstellt von Seth Bailey am 28/04/2020.
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- Seth Bailey
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