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kari74 [83]
3 years ago
6

Arthropods have an exoskeleton made of _____.

Biology
2 answers:
sattari [20]3 years ago
7 0
The answer is cartillage
lara [203]3 years ago
7 0

Answer: chitin

Explanation:

An arthropod is an invertebrate animal that exhibit an exoskeleton that can be define as an external outer covering of the animals. The exoskeleton in the arthropods is made up of chitin. The hard outer exoskeleton plays many roles like it provides the protection to the animal against the predator, any environmental hazard and it is waterproof which means it does not allow the entrance of external water inside the body cover of the animal.

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Which statement is true? oceanic crust is denser than continental crust oceanic crust is less dense than continental crust ocean
vazorg [7]

Answer:

Oceanic crust is thinner and denser than continental crust.

5 0
3 years ago
2. Dominant trait: cleft chin (C) Mother’s gametes: Cc
kakasveta [241]

Answer No 2:

      c      c

C   Cc     Cc

c    cc      cc

The genotype of the offsprings would be Cc, Cc, cc, cc i.e heterozygous cleft chin and no cleft chin. The phenotype of the offsprings could be 50% cleft chin and 50% without cleft chin.

there will be 50% chance of the child to have cleft chin.

Answer No 3:

        A        a

A     Aa       Aa

a      Aa        aa

There will be 25% chance for the offspring to have arched feet. As arched feet is a recessive trait, so for this trait to occur both the alleles of the gene should be recessive i.e aa.

Answer No 4:

    B      b

b   Bb    bb

b    Bb    bb

As blonde is a recessive trait, so both the alleles for this gene should be recessive for this trait to occur. Hence, according to the punnet square, there will be 50% chance for the offspring to be blonde.

Answer No 5:

           F      f

F          FF    Ff

f           Ff     ff

As normal vision is a resessive trait, hence both the alleles of the gene should be recessive for the trait to occur. According to the punnet square, there is 25% chance that the child will have normal vision.

3 0
3 years ago
Which of the following statements about the development of infectious diseases is correct?
zalisa [80]

The period of Convalescence is the time during which the person regains health and fully recovers.

Explanation:

  • Diseases that can spread from one person to other  are called infectious disease.
  • Disease development is divided into Incubation period, Prodromal period, period of illness, Decline period, and period of Convalescence.
  • During incubation period the pathogen enters the host body and starts multiplying itself. But the signs of diseases are unnoticeable.
  • Then comes  the prodromal period, when the pathogen keeps multiplying itself and some signs of disease are observed but they are not obvious
  • After the prodromal period comes the period of illness when the patient exhibits obvious signs of sickness.
  • As the period of illness is over the symptoms of disease start to cease and the the number of pathogen decrease in body.This period is the period of decline.
  • Finally comes the period of Convalescence when the person returns to his pre-disease state and is completely healthy. (except irreversible damage caused by the disease)
7 0
3 years ago
What law of motion states that if no Force acts on an object at rest it will remain at restbb​
Korvikt [17]
Hey there!

The answer is

Newtons first law of inertia. "An object with no net forces acting on it which is initially at rest will remain at rest. If it is moving, it will continue to move in a straight line with constant velocity"

Hope i helped!

Please mark me brainliest!!!!!
4 0
4 years ago
What was the strength of the Southern colonies?
tester [92]
The answer for your question is 1. Easy to grow crops
4 0
3 years ago
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