B3 GROWTH AND DEVELOPMENT

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  • Created by: Delice
  • Created on: 12-03-17 09:46
name three things that both plant and animal cells contain
nucleus , cell membrane , cytoplasm
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why do plants contain chroloplasts and a cellulose cell wall?
to proide support and a vacuole that contains cell sap and helps provide support
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where do plant cells keep their DNA
inside the nucleus
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where do bacterial cells keep their DNA
they have it floating as circular strands
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give differences between bacterial cells and animal and plant cells
Bacterial cells are smaller and simpler than plant and animal cells . Bacterial cells lack true nucleus . They also lack mitochondria and chloroplasts
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what is the use of a cellulose cell wall in plant cells
it strengthens and supports the cells
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what is the use of a permanent vacuole in plant cells
It is filled with cell sap , it helps to support the cell
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what is the use of chloroplast in plant cells
it contains chlorophyll
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what is the use of nucleus in plant cells
It controls what the cell does and contains the genetic information
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what is growth measured as
it is measure as an increase in height or mass
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what does growth involve
cell division and cell differentiation
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how do animals grow
by increasing the number of cells . The cells specialise or differentise into different types of cell at an early stage to form tissues and organs
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give differences between plant and animal cells
1) plant cells lose the ability to differentiate at an early stage while plant cells do not. 2) plant cells retain the ability to differentiate or specialise throught their lives whereas animals lose this ability at an early stage
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give differences between plants and animals
animals grow in early stages of their lives and grow to a finite size. But given the right conditions , many plants can grow continuously. 2) all parts of an animal are invoved with growth whereas plants grow at specific parts of the plant
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where is plant cell division mainly restricted
it is mainly restricted in areas called meristems at the roots and tips
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what are the stages of rapid growth in humans
just after birth , during adolescence
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how do plants gain height
by cell enlargement
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what are stem cells
they are undifferentiated animal cells which can spcialise and develop into different types of cells , tissues and organs
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how can stem cells be obtained
from embryonic tissue. scientists believe that stem cells could potentially be used to treat medical conditions which presently have no cure
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what do scientists need to do for research on stem cells
they need to obtain large numbers of embryos to grow the stem cells in the labaratory . At present , unused embryos from IVF ( invitro fertilisation ) treatments are used
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Why do some people agree with the use of left over embryos from IVF treatments
2) because they would otherwise be be destroyed , so its a good use for them 2) the potential to cure disease is important
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why do some people disagree with the use of left over embryos from IVF treatments
1) it is wrong to experiment on embryos 2) human life is sacred and shouldnt be experimented on . 3) playing god is wrong and unnatural
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Give the difference between embryoric stem cells and adult stem cells
Embryoric stem cells can become any type of body cell , whereas adult stem cells are limited to differentiate into the cell types from their tissue of origin. So embryonic stem cells have a much wider use
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Other cards in this set

Card 2

Front

why do plants contain chroloplasts and a cellulose cell wall?

Back

to proide support and a vacuole that contains cell sap and helps provide support

Card 3

Front

where do plant cells keep their DNA

Back

Preview of the front of card 3

Card 4

Front

where do bacterial cells keep their DNA

Back

Preview of the front of card 4

Card 5

Front

give differences between bacterial cells and animal and plant cells

Back

Preview of the front of card 5
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