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A level Biology: Post your doubts here!

Saif Qureshi

Saif Qureshi

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Can any one explain the function of transcription factors in gene expression in eukaryotes.
If they ask this in Section B
 
O

osama ahmed ibrahim

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desribe reasons why named species has become endangeredd
help

named species (no mark)
four relevant reasons for a named species ; ; ; ;
e.g. animal species
direct human effect e.g. hunting / fishing / collection / skins
habitat destruction
climate change qualified
increase in pollution
spread / increase, in disease or new disease
lack of food
increased predation
e.g. plant species
direct human effect e.g. specimen collection / logging
habitat destruction
climate change qualified
increase in pollution
spread / increase, in disease or new disease
loss of pollinators
increased competition from introduced plants
 
M

My Name

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osama ahmed ibrahim said:
desribe reasons why named species has become endangeredd
help

named species (no mark)
four relevant reasons for a named species ; ; ; ;
e.g. animal species
direct human effect e.g. hunting / fishing / collection / skins
habitat destruction
climate change qualified
increase in pollution
spread / increase, in disease or new disease
lack of food
increased predation
e.g. plant species
direct human effect e.g. specimen collection / logging
habitat destruction
climate change qualified
increase in pollution
spread / increase, in disease or new disease
loss of pollinators
increased competition from introduced plants
Click to expand...
ndangered species are those whose number is drastically decreasing due to various reasons and are on the verge of becoming extinct.

For instance Pandas are endangered due to the destruction of their habitat. Humans cut down forests and areas of vegetation where they live to build home for themselves and also regions where they feed.

Another example could be Polar bears. They are endangered due to various human activities. Human activities like pollution that causes global warming. This causes the temperature to rise and areas where they live become warmer.

Next example is the Bengal tigers.They are endangered because they are always hunted for their fur and meat. This has decreased their number.

Another example are the elephants.They are endangered because of mainly deforestation.There is lack of food and thus less survive and reproduce.

You can also add some point about a named plant...that they might have less pollinators because other plants are in tough competition with it and thus less reporduction.Maybe you remember the name of that red-ish flower that is endangered.The name starts with the letter R. :p I saw it in a past paper question.It is large in size.
 
Midnight dream

Midnight dream

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My Name said:
ndangered species are those whose number is drastically decreasing due to various reasons and are on the verge of becoming extinct.

For instance Pandas are endangered due to the destruction of their habitat. Humans cut down forests and areas of vegetation where they live to build home for themselves and also regions where they feed.

Another example could be Polar bears. They are endangered due to various human activities. Human activities like pollution that causes global warming. This causes the temperature to rise and areas where they live become warmer.

Next example is the Bengal tigers.They are endangered because they are always hunted for their fur and meat. This has decreased their number.

Another example are the elephants.They are endangered because of mainly deforestation.There is lack of food and thus less survive and reproduce.

You can also add some point about a named plant...that they might have less pollinators because other plants are in tough competition with it and thus less reporduction.Maybe you remember the name of that red-ish flower that is endangered.The name starts with the letter R. :p I saw it in a past paper question.It is large in size.
Click to expand...
The Flower Name is Rosella.
 
O

osama ahmed ibrahim

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47
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My Name said:
ndangered species are those whose number is drastically decreasing due to various reasons and are on the verge of becoming extinct.

For instance Pandas are endangered due to the destruction of their habitat. Humans cut down forests and areas of vegetation where they live to build home for themselves and also regions where they feed.

Another example could be Polar bears. They are endangered due to various human activities. Human activities like pollution that causes global warming. This causes the temperature to rise and areas where they live become warmer.

Next example is the Bengal tigers.They are endangered because they are always hunted for their fur and meat. This has decreased their number.

Another example are the elephants.They are endangered because of mainly deforestation.There is lack of food and thus less survive and reproduce.

You can also add some point about a named plant...that they might have less pollinators because other plants are in tough competition with it and thus less reporduction.Maybe you remember the name of that red-ish flower that is endangered.The name starts with the letter R. :p I saw it in a past paper question.It is large in size.
Click to expand...
thanks but i dont understand point climate change qualified
 
M

My Name

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osama ahmed ibrahim said:
thanks but i dont understand point climate change qualified
Click to expand...
Welcome.
It just means that some human activities can result in climate change and then some animals can't adjust to those changes and thus less chances of survival.Polar bears is an example I can at the moment think of. :3
 
O

osama ahmed ibrahim

Messages
47
Reaction score
11
Points
8
My Name said:
ndangered species are those whose number is drastically decreasing due to various reasons and are on the verge of becoming extinct.

For instance Pandas are endangered due to the destruction of their habitat. Humans cut down forests and areas of vegetation where they live to build home for themselves and also regions where they feed.

Another example could be Polar bears. They are endangered due to various human activities. Human activities like pollution that causes global warming. This causes the temperature to rise and areas where they live become warmer.

Next example is the Bengal tigers.They are endangered because they are always hunted for their fur and meat. This has decreased their number.

Another example are the elephants.They are endangered because of mainly deforestation.There is lack of food and thus less survive and reproduce.

You can also add some point about a named plant...that they might have less pollinators because other plants are in tough competition with it and thus less reporduction.Maybe you remember the name of that red-ish flower that is endangered.The name starts with the letter R. :p I saw it in a past paper question.It is large in size.
Click to expand...
suppose i mentioned all reasons for bengal tiger or rosella
will they check validity of my answer
 
T

tasneemfawzy98

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0ct/nov 2013 paper 41 question 4 a) parts (i) and (ii)
(i) is there any other way of calculating the menstrual cycle other than using oestrogen peaks?
(ii) I dont understand how the luteal phase ended at day 29 or 30 when they clearly mentioned in the question that it ends when menstruation starts (given that the cycle is 28 days).

Please help. Thank you so much!
 
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