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
Zinaida [17]
3 years ago
13

7. Explain why we have 4 seasons.

Biology
1 answer:
Juliette [100K]3 years ago
4 0

Answer:

The four seasons happen because of the tilt of the Earth's axis. At different times of the year, the sun's rays hit different parts of the globe more directly. The angle of the Earth's axis tilts the Northern Hemisphere towards the sun during the summer.

Explanation:

You might be interested in
It is a state of well-being when all internal and external body parts, organs, tissues and cells can function properly as they a
Verizon [17]

Answer:

a

Explanation:

if you are Emotional Healthy, all the functions will be followed.

6 0
3 years ago
Read 2 more answers
How were Lamarck’s and Darwin’s ideas most similar?
irinina [24]

Answer:

Darwin and Lamarck's theory is different but they were also very similar. Both of them thought that the organism changed, and they are very helpful for the organism to survive. These characteristics are also passed to their young generation.

Darwin theory state that an organism gets the helpful variation before the changes in the environment, Lamarck's theory said that organism gets variation after the change in the environment.

Lamarck's stated that giraffe got long neck when the food on the ground ran out. In order to get the food they stretch out their neck to get food. Darwin thought organism changed by chance, at the time when they are born and before the change in the environment.


6 0
4 years ago
Read 2 more answers
Please help ASAP! Describe at least one way in which each of Earth’s subsystems was altered during the Precambrian era.
trasher [3.6K]

The Precambrian era envelopes the major bulk of the history of the Earth, beginning from the creation of the planet approx 4.5 billion years ago and terminating with the origination of composite, multicelled forms of life approximately 4 billion years after.

The Precambrian refers to the earliest of the geologic ages that are signified by the distinct layers of sedimentary rock. The Earth was about more than six hundred million years old when life started. The planet had cooled down from its native molten state, creating a solid crust and oceans formed by water vapor in the atmosphere.

At about three billion years ago, the atmosphere of the Earth was virtually devoid of oxygen. At approximately 2.4 billion years ago, oxygen was discharged from the seas as a waste product of photosynthesis by cyanobacteria. The levels of the gas slowly raised, attaining about 1 percent around two billion years ago.

Approximately 800 million years ago, the levels of oxygen attained about 21 percent and started to breathe life into more composite species. The oxygen-rich ozone layer was also created, protecting the surface of the Earth from the harmful solar radiation.


8 0
4 years ago
Read 2 more answers
_____ is when a force is exerted on an object and the object moves a distance in the direction of the force.
andriy [413]
Hey there!

<span> _____ is when a force is exerted on an object and the object moves a distance in the direction of the force.

Answer: Work

Hope this helps
Have a great day (:
</span>
7 0
3 years ago
Read 2 more answers
Viral genomes may comprise Choose one: A. double-stranded RNA. B. double-stranded DNA. C. double or single-stranded DNA or doubl
wlad13 [49]

Answer:

The correct answer is- C. double or single-stranded DNA or double or single-stranded RNA.

Explanation:

All the viruses are intracellular parasites which means they obtain their nutrition from their host. Viruses do not have cellular level of organization. They only have their nucleic acid which is surrounded by a protein coat called a capsid.

The nucleic acid in viruses can be of different types. It can be single or double-stranded DNA or single or double-stranded RNA. Their genome can be linear or circular. They inject their genetic material in their host and introduce it in the host genome. Therefore the correct answer is C.

6 0
4 years ago
Other questions:
  • Name two non-renewable energy sources?
    13·2 answers
  • [simple question][Please answer]
    6·1 answer
  • n horses, the hair color gene has a dominant allele B (Black) and a recessive allele b (Chestnut). The gait gene has a dominant
    8·2 answers
  • What impact did Suleyman I have on the Ottoman Empire?
    12·2 answers
  • Scientists are working to find a cure for AIDS. HIV, the virus that causes AIDS, is among the 70 percent of viruses that contain
    11·2 answers
  • The circulatory systems of land-dwelling vertebrates are composed of two pumping circuits: the systemic circulation, which is a
    12·1 answer
  • The cells of certain eukaryotic organisms, such as vertebrates and plants, often methylate the cytosines in their DNA, producing
    8·1 answer
  • Plz help help help help
    14·1 answer
  • Which of the following statements about coal is not true?
    11·2 answers
  • Classify the statements based on whether they describe earthquakes or volcanoes.
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!