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Biology

Asked by Zohaib

How have birds evolved to detect uv light ?

Humans have a triple cone structure of our eyes that allows us to see a spectrum based on our three primary colours: red, green and blue. However, birds have an additional cone allowing them to also see ultraviolet light. Not much is known about this as we cannot see it at all, but it is thought that birds developed this fourth cone in order to perceive contrasts in trees and foliage that to human... more

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Jasmine Lowen-Hill
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523 students helped

Biology

Asked by Milea

I don't understand the nitrogen cycle very well, the wording that people use us very hard for me to understand and remember

• Nitrogen is needed to make proteins • Neither plants nor animals can absorb it from the air, since the bonds holding nitrogen atoms together in N2 (nitrogen) gas are very strong so need LOTS of of energy to break • However, there are two ways nitrogen can be taken out of the air and converted into something easier to absorb: o Nitrogen fixing bacteria found ‘free living’ in soil and also in the... more

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Amina Imran
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554 students helped

Biology

Asked by Alii

Adaptations of root hairs to its function

Hiya Alii, Root hair cells are adapted for taking up water and mineral ions by having a large surface area to increase the rate of absorption. They also contain lots of mitochondria, which release energy from glucose during respiration in order to provide the energy needed for active transport.

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Scarlett - Anne
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221 students helped

Biology

Asked by Babu

Five adaptations of root hair

- Root hair cells have long extensions/projections (hairs) on their outer surface to increase surface area to increase rate of osmosis of water and diffusion of mineral ions - On root hair cell membranes they have pumps to absorb mineral ions by active transport - Many mitochondria to provide ATP for the active transport of ions - Thin cell wall to reduce diffusion distance for ions and water -... more

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Haziq Ibrahim
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182 students helped

Biology

Asked by Vinita

What is active immunity

The immunity which results from the production of antibodies by the immune system in response to the presence of an antigen.

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Megan Thomas
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109 students helped

Biology

Asked by Princeval

What is photosynthesis?

Hi Princeval, maybe this can help you understand further https://www.britannica.com/science/photosynthesis :) Good luck!

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Soumiya Ds
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124 students helped

Biology

Asked by Mohamed

Funtionof root hair

Root hair cells are singular cells. They are involved in transpiration which is the movement of water through a plant. How they help is they absorb water, they have a very large surface area to maximise the water that they can absorb

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Saskia De La Torre
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2.2k students helped

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