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
rewona [7]
2 years ago
11

In the article, Invasion of the Periodical Cicadas, why do scienctists believe that cicadas only reproduce every 13 or 17 years?

Explain your answer with evidence from the text.
Chemistry
1 answer:
frez [133]2 years ago
8 0

Hi, you've asked an incomplete question. However, I assumed you are referring to the article found on the Scientific American website.

Explanation:

<em>Remember,</em> according to that article we are told that scientists notice that these insects have a long nymphal (immature form before becoming adults) stage, one that can last up to 13 to 17 years on the ground before they leave the ground looking for mating partners.

Because it is only after mating occurs at this point that their eggs are laid, that is why scientists believe that cicadas only reproduce every 13 or 17 years.

You might be interested in
Which statement correctly describes the conductivity of the specified material?
scoray [572]

Answer:

Gold has a high conductivity

Explanation:

This is because gold is a metal that occur free in nature in rocks, alluvial , grains e.t.c. it is a transition metal and in group 11 of the periodic table do it conduct electricity. It has has conductivity because it is a metals because all metals have ability to conduct electricity. When it is pure, it is a bright, slightly reddish yellow, . It is soft, malleable.

It is a ductile metal

and ductile metal.

4 0
3 years ago
Which describes the flow of energy in a food chain? (Which food chain makes sense) A. Sun--&gt;Grass--&gt;Mouse--&gt;Snake B. Gr
zheka24 [161]
A. would be the best answer to the question
4 0
3 years ago
What are the types of chemical equations ?
harkovskaia [24]

Answer:

combination

Decomposition

single displacement

double displacement

combustion

Redox    

Explanation:

7 0
2 years ago
Given that the ka for hocl is 3.5 × 10–8, calculate the k value for the reaction of hocl with oh–.
Harlamova29_29 [7]
Following reaction is involved in above system
HOCl(aq)  ↔  H+(aq) + OCl-<span>(aq)
</span>OCl-(aq) + H2O(l)  ↔ HOCl(aq) + OH-<span>(aq)
</span>
Now, if the system is obeys 1st order kinetics we have
K  = [OCl-][H+<span>]/[HOCl]   ............. (1)
</span>∴ [HOCl-] / [OCl-] = [H+] (1 / 3.0 * 10-8<span>)   ............. (2)
</span>
and now considering that system is obeying 2nd order kinetics, we have
K  = [OH-][HOCl-] / [OCl-] ................. (3<span>)
</span>Subs 2 in 3 we get
K = [OH-][H+] (1 / 3.0 * 10-8<span>)
</span>we know that, [OH-][H+] = 10<span>-14

</span>∴K = 3.3 * 10<span>-7
</span>
Thus, correct answer is e i.e none of these
6 0
3 years ago
Read 2 more answers
During an experiment, a student observes the formation of a precipitate. Why does this indicate that a chemical reaction is like
My name is Ann [436]

A. A solid forms, and there is a change of color.

8 0
3 years ago
Other questions:
  • Laws differ from theories because laws do not provide
    8·2 answers
  • An empty graduated cylinder weighs 55.26 g. When filled with 50.0 mL of an unknown liquid, it weighs
    5·1 answer
  • A scuba diver 25.0m below the sea surface inhales 75.0mL of compressed air in a scuba tank at a pressure of 3.50atm and a temper
    12·1 answer
  • Calculate the mass percent of a solution that is prepared by adding 68.1 g of NaOH to 341 g of H20.
    7·1 answer
  • What is the resistance of a blub when the voltage across is 6 V and the current is 0.2A?
    14·1 answer
  • A golfer hits a ball (m = 50. G) causing it to the leave its fairway lie with a velocity of 32 m/s. Determine the change in mome
    15·1 answer
  • The blades of a wind turbine are at rest until the movement of air causes the blades to spin.
    13·1 answer
  • the mass concentration the mass concentration for a solution containing 45 g of calcium carbonate is 100 cm3 ​
    8·1 answer
  • What happens when light hits the rough surface of a tree?
    15·2 answers
  • HELP PLS WILL GIVE BRAINLIEST AND THANKS
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!