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Korvikt [17]
3 years ago
6

Describe the defense mechanisms evolved by plants to reduce predation by herbivores.

Biology
1 answer:
Ganezh [65]3 years ago
4 0

Answer:

There are two types of defense mechanism of plants against herbivorous

1- Mechanical defense

2- Chemical defense  

Explanation:

Mechanical defense is a first line defense in which plant makes barriers which is made up of wax cutical and bark and they form spines on leaves, thorns on branches which can helps in resistance and physical damage to animals.

Chemical Defense is a type in which plant produces some metabolites, toxins and chemicals which is very toxic to animals and helps in defense example alkaloids.

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Imagine that a given species has a gene for hair color (B = dominant brown, b = recessive white) and a gene that controls hair l
serg [7]

Answer:

Phenotypes: All Brown Hair Color and All Short Hair Length

Genotypes:

Homozygous dominant hair color and  homozygous dominant hair length: (BBSS, BBSS, BBSS, BBSS).

Homozygous dominant hair color and heterozygous hair length: (BBSs, BBSs, BBSs, BBSs)

Heterozygous hair color and homozygous dominant hair length: (BbSS, BbSS, BbSS, BbSS)

Heterozygous hair colour and heterozygous hair length: (BbSs, BbSs, BbSs, BbSs)

Explanation:

Hair color :

B = dominant brown

b = recessive white

Hair length :

S = dominant short

s = recessive long

The dihybrid cross between parents with the genotypes:

BBSS × BbSs

If BBSS self crossed; we have the following traits= BS, BS, BS, BS

If BbSs self crossed; we have the following traits= BS, Bs, bS, bs

The dihybrid cross is as follows:

              BS                     BS                  BS                BS

BS          BBSS                BBSS            BBSS             BBSS        

Bs          BBSs                 BBSs            BBSs              BBSs

bS          BbSS                BbSS           BbSS              BbSS

bs          BbSs                 BbSs            BbSs              BbSs

Phenotypes = All Brown Hair Color and All Short Hair Length

Genotypes include:

Homozygous dominant hair color and  homozygous dominant hair length: (BBSS, BBSS, BBSS, BBSS).

Homozygous dominant hair color and heterozygous hair length: (BBSs, BBSs, BBSs, BBSs)

Heterozygous hair color and homozygous dominant hair length: (BbSS, BbSS, BbSS, BbSS)

Heterozygous hair colour and heterozygous hair length: (BbSs, BbSs, BbSs, BbSs)

7 0
3 years ago
A humpcnid enocaom is made of two or more simple machines.
zhuklara [117]

<em>Hi! :) :) The question statement says</em>: <u>"A Humpcnid Enocaom is made of two or more simple machines."</u>

<u></u>

The answer/def: <u><em>Compound Machine </em></u>

Hope this helps! <3

3 0
4 years ago
Which is in the shape of a double helix?
Ghella [55]
Deoxyribonucleic Acid, or DNA is in the shape of a double helix
4 0
3 years ago
Which of the following is evidence used to support cell theory? (Choose all that apply)
pentagon [3]

Answer:

I think it's (C)......

3 0
4 years ago
What happens when two moving objects collide?
sdas [7]
<span>They bounce off each other and then they stop.</span>
5 0
3 years ago
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