1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Molodets [167]
4 years ago
13

What are the 1st and 2nd line of defence of plant against pathogens?

Biology
1 answer:
sladkih [1.3K]4 years ago
6 0

Answer: These may be:

  • physical defenses  (1st line)
  • chemical defenses (2nd line)

Explanation:

Plants employ several methods in order to defend themselves from pathogens. These may be physical defenses or chemical ones. Several have adaptations to their surfaces that prevent the entry of pathogens, called physical barriers such as

  • thick waxy cuticles
  • thorns, which are modified plant branches
  • spines, which are modified plant leaves
  • gall production at infected sites to prevent pathogenic spread

Chemical defenses include the production or secretion of:

  • defensins
  • antimicrobials such as tannins or resins
  • gum at areas facing pathogenic attacks

You might be interested in
How does the sea ice in 2019 compare to the sea ice in 2012 during April?
Katarina [22]

The total amount of sea ice showed a decline from 2012 to 2019. The correct option would be D.

<h3>Graphical illustration</h3>

Looking at the graph, from February to June 2012, there is a decline in the amount of sea ice.

A similar decline in the amount of sea ice can be observed in the year 2019.

However, the sea ice levels for the various months in 2012 remain generally above the sea ice levels in the various months in 2019.

Thus, overall, one can say there is a general decline in the ice level from 2012 to 2019.

More on graphical illustrations can be found here: brainly.com/question/21376268

#SPJ1

4 0
2 years ago
Is corn a lipid or carbohydrates
Alborosie

Answer:

yes

Explanation:

it's a fatty

4 0
4 years ago
Read 2 more answers
All BUT one is a function of plants epidermal tissue. That is
Zielflug [23.3K]
The answer is D. Transports fluids throughout the plant.:)<span>
</span>
8 0
3 years ago
Read 2 more answers
Which of the following is NOT TRUE about Y-linked disorders?
Usimov [2.4K]

Answer:

<em>The statement which is not true is C) They can affect males or females</em>

Explanation:

All the chromosomes in a person are known to be autosomal chromosomes except for the sex chromosomes. The sex chromosomes are of two types: Chromosome X and chromosome Y.

Both the sex chromosomes are X in females. Males have one X chromosome and one Y chromosome. The Y chromosome is shorter than the X chromosome. The Y chromosomes occur only in males. Hence, Y- linked disorders will affect only males. These disorders will never occur in females.

4 0
3 years ago
Due to Mendel's law of segregation
kondor19780726 [428]

Answer: each allele is its own entity and always has an equal chance of being passed on to the next generation

Explanation:

I already learned this and i remember that is why my notes said and i also looked it up.

5 0
3 years ago
Other questions:
  • Who can help me ? ??
    6·1 answer
  • American vultures used to be classified in the same family as African vultures. Which discovery caused scientists to reclassify
    5·1 answer
  • What type of skeleton (ENdoskeleton, EXoskeleton, or None) do sponges have
    11·1 answer
  • Select the correct answer from each drop-down menu.
    7·1 answer
  • Select the correct answer from each drop-down menu. Sickle cell disease is passed on from parent to offspring. Sickle cell disea
    10·1 answer
  • By what reproductive mechanism does a haploid animal grow?
    15·2 answers
  • The first recorded history of them dates back to 1549 when the Spanish were exploring the area.
    6·1 answer
  • How does the introduction of invasive species, such as the brown tree snake, upset the stability of an ecosystem?
    6·2 answers
  • What type of muscle tissue is this
    11·2 answers
  • An atom has 10 protons, 11 neutrons, and 9 electrons. What is the charge of this atom?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!