What id cell elongation and what does it occur/not occur in?
Plant cells are able to become longer as they grow. This process is called cell elongation and occurs throughout the plant, not just in the meristems. Cell elongation does not occur in animals.
Key Terms
What id cell elongation and what does it occur/not occur in?
Plant cells are able to become longer as they grow. This process is called cell elongation and occurs throughout the plant, not just in the meriste...
differentiation of cells in multicelluar organisms.
Why?
What does it happen in?
what are cells that have become differentiated called?
The cells of multicellular animals and plants must differentiate, so that its cells develop features that enable them to fulfil specific roles. Cel...
Examples of specialised cells in animals. cells of the:
Circulatory system
Excretory system
Muscular system
Nervous system
Respiratory system
Reproductive system
Skele...
specialisation of animals cells.
| what are the cells of the Circulatory system specialised to do?
Transport substances.
Defend the body.
Regulate temperature.
specialisation of animals cells.
| what are the cells of the Excretory system specialised to do?
Remove waste products and unwanted substances.
| - Regulate the water content of the body.
specialisation of animals cells.
| what are the cells of the Muscular system specialised to do?
Bring about movement.
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| Term | Definition |
|---|---|
What id cell elongation and what does it occur/not occur in? | Plant cells are able to become longer as they grow. This process is called cell elongation and occurs throughout the plant, not just in the meristems. Cell elongation does not occur in animals. |
differentiation of cells in multicelluar organisms. Why? What does it happen in? what are cells that have become differentiated called? | The cells of multicellular animals and plants must differentiate, so that its cells develop features that enable them to fulfil specific roles. Cells that have differentiated have become specialised. Without this specialisation, complex multicellular animals and plants would not exist. |
Examples of specialised cells in animals. cells of the: | Circulatory system Excretory system Muscular system Nervous system Respiratory system Reproductive system Skeletal system |
specialisation of animals cells. | what are the cells of the Circulatory system specialised to do? | Transport substances. Defend the body. Regulate temperature. |
specialisation of animals cells. | what are the cells of the Excretory system specialised to do? | Remove waste products and unwanted substances. | - Regulate the water content of the body. |
specialisation of animals cells. | what are the cells of the Muscular system specialised to do? | Bring about movement. |
specialisation of animals cells. | what are the cells of the Nervous specialised to do? | Respond to internal and external stimuli and conditions. | - Carry messages for the body to work as a coordinated whole. |
specialisation of animals cells. | what are the cells of the Respiratory system specialised to do? | Deliver oxygen for respiration and remove waste. |
specialisation of animals cells. | what are the cells of the Reproductive system specialised to do? | Bring about fertilisation to produce new offspring. |
specialisation of animals cells. | what are the cells of the Skeletal system specialised to do? | To bring about movement. Support and protect internal structures. Produce blood cells. Store and release calcium. |
Examples of specialised cells in plants. | In the leaf: | Palisade mesophyll Spongy mesophyll Guard cells |
Specialisation of plant cells. What are the cells of the Palisade mesophyll tissue specialised to do? (palisade cells that make up the mesophyll) | Carry out photosynthesis. |
Specialisation of plant cells. | What are spongy mesophyll cells specialised to do? | Allow gases to circulate for the exchange of gases between the leaf and the environment. Carry out photosynthesis. |
Specialisation of plant cells. | What are Guard cells specialised to do? | Open and close to control the exchange of gases – carbon dioxide, water vapour and oxygen. |
Examples of specialised cells in plants. | In the phloem: | Sieve tubes | - Companion cells |
Specialisation of plants cells. | What are sieve tubes specialised to do? | Transport products of photosynthesis, including sugars and amino acids, from the leaf to where they are needed. |
Specialisation of plant cells. | What are companion cells Specialised to do? | Provide the energy required for transporting substances in sieve tubes. |
Give and example of a specialised cell in the xylem and what it is specialised to do. | Xylem vessels. | Specialised to transport water and dissolved minerals from the roots, up the plant. |
Give and example of a specialised cell in growing plants and what it is specialised to do. | Meristem. | Specialised to produce new cells as they divide. |
Monitoring growth. in which ways can the growth of babies be measured? how can the growth of babies in all of these measurements me monitored? | The growth of babies is measured in the following ways: Mass (kg) Length (cm) Head circumference (cm) The growth of babies in all three of these measurements can be monitored using percentile growth charts. |
What are the stages of mitosis? | 1) Interphase 2) Prophase 3) Metaphase 4) Anaphase 5) Tekphase 6) Cytokinesis |
What happens during the first stage of mitosis (Interphase)? | The cell spends most of its life in this phase. The DNA in chromosomes copies itself ready for mitosis. |
What happens during the second stage of mitosis (Prophase)? | The DNA in chromosomes and their copies condenses to become more visible. The membrane around the nucleus disappears. |
What happens during the third stage of mitosis (metaphase)? | Chromosomes and their copies line up in the middle of the cell. |
What happens during the fourth stage of mitosis (anaphase)? | Chromosomes and their copies are pulled to different ends of the cell. |