Biology

Question 1

What plant hormones grow plants ?

Answer 1

Plant hormones called gibberellins help seeds to germinate and start to grow roots and shoots.

Question 2

Uses for plant hormones ?

Answer 2

pant hormones can be used for ​

Growing cuttings​

Ripening fruit​

Killing weeds​

Controlling dormancy ​

Making seedless fruit.

Question 3

uses of auxins

Answer 3

Most weeds growing in fields of crops or in a lawn are broad- leaved, in contrast to grasses and cereals which have very narrow leaves. ​

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Selective weed killers have been developed using auxins, which only affect the broad-leaved plants. ​

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They totally disrupt their normal growth patterns which soon kills them, whist leaving the grass and crops untouched.

Question 4

Use of auxins

Answer 4

A cutting is part of a plant that has been cut off it, like the end of a branch with a few leaves on it. ​

Normally is put in a pot of soil they don’t grow, but if you add rooting powder, which contains auxins, they produce roots rapidly making a new plant. ​

This enables growers to produce lots of clones (exact copies) of really good plants really quickly

Question 5

tissue culture ?

Answer 5

A cutting is part of a plant that has been cut off it, like the end of a branch with a few leaves on it. ​

Normally is put in a pot of soil they don’t grow, but if you add rooting powder, which contains auxins, they produce roots rapidly making a new plant. ​

This enables growers to produce lots of clones (exact copies) of really good plants really quickly