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
ch4aika [34]
2 years ago
6

O nosso planeta é extremamente vasto e ainda está longe de ser completamente explorado. Curiosamente, a maior parte da superfíci

e terrestre é coberta de oceanos e eles permanecem um grande mistério para a humanidade. Pouco se conhece sobre as profundezas do oceano, mas durante a Segunda Guerra, devido ao uso de sonares para detectar submarinos, o homem conseguiu uma série de descobertas a respeito desse ambiente. A respeito dos oceanos, podemos dizer que:
a)os oceanos, apesar de serem extremamente vastos e robustos, possuem a maior parte da fauna em sua superfície, tendo as profundezas praticamente vazias de vida.

b)as profundezas do oceano são conhecidas por serem ambientes prósperos para a vida, com abundância de luz, alimento e poucos predadores, por isso muitos peixes e outras formas de vida habitam lá.

c)os oceanos são muito profundos, possuem um solo arenoso similar a de um deserto plano em seu fundo.

d)existem indícios de que áreas que hoje são oceanos antigamente eram superfície terrestre. Essas alterações podem ser atribuídas ao movimento tectônico das placas.
Biology
1 answer:
o-na [289]2 years ago
3 0
C I think I’m not rlly sure
You might be interested in
Stars change over millions of years.<br>O True<br>O False​
SCORPION-xisa [38]

Answer:

true

Explanation:

stars can change bc Stars change over time. ... It is in the clouds of dust and gas that stars are born. As more and more of the gas (which is mostly hydrogen) is pulled together by gravity into a cloud, the cloud starts to spin. The gas atoms start to bump into each other faster and faster.

8 0
2 years ago
The chemical weathering of rocks at the Earth's surface releases _______ into the biosphere.
Molodets [167]
Nitrogen. Rocks have nitrogen in them.  But just to be sure you should also just look it up to see if I am right. 
8 0
3 years ago
What is the function of the nervous system? What is the basic unit of the nervous system?
Sidana [21]

Answer:

Illustration of the architecture of a neuron, including the cell body, nucleus, dendrites, axon, myelin sheath, node of Ranvier, synapses, and axon terminal. ( the photo with the answer )  

The nervous system has two main parts:

The central nervous system is made up of the brain and spinal cord.

The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.

The nervous system transmits signals between the brain and the rest of the body, including internal organs. In this way, the nervous system’s activity controls the ability to move, breathe, see, think, and more.

The basic unit of the nervous system is a nerve cell, or neuron. The human brain contains about 100 billion neurons. A neuron has a cell body, which includes the cell nucleus, and special extensions called axons and dendrites. Bundles of axons, called nerves, are found throughout the body. Axons and dendrites allow neurons to communicate, even across long distances.

Different types of neurons control or perform different activities. For instance, motor neurons transmit messages from the brain to the muscles to generate movement. Sensory neurons detect light, sound, odor, taste, pressure, and heat and send messages about those things to the brain. Other parts of the nervous system control involuntary processes. These include keeping a regular heartbeat, releasing hormones like adrenaline, opening the pupil in response to light, and regulating the digestive system.

When a neuron sends a message to another neuron, it sends an electrical signal down the length of its axon. At the end of the axon, the electrical signal changes to a chemical signal. The axon then releases the chemical signal with chemical messengers called neurotransmitters into the synapse     the space between the end of an axon and the tip of a dendrite from another neuron. The neurotransmitters move the signal through the synapse to the neighboring dendrite, which converts the chemical signal back into an electrical signal. The electrical signal then travels through the neuron and goes through the same conversion processes as it moves to neighboring neurons.

The nervous system also includes non-neuron cells, called glia . Glia perform many important functions that keep the nervous system working properly. For example, glia:

1-  Help support and hold neurons in place

2- Protect neurons

3- Create insulation called myelin, which helps move nerve impulses

4- Repair neurons and help restore neuron function

5- Trim out dead neurons

6- Regulate neurotransmitters

The brain is made up of many networks of communicating neurons and glia. These networks allow different parts of the brain to “talk” to each other and work together to control body functions, emotions, thinking, behavior, and other activities.

Explanation:

5 0
3 years ago
Read 2 more answers
Asssap will give 100 poits
777dan777 [17]

Answer:

"You have to believe the exercise works before you try it" would be the pseudoscientific claim.

5 0
2 years ago
Read 2 more answers
Write two differences between the unicellular and multicellular organisms.
UNO [17]

Answer:

The cell membrane is the semipermeable membrane of a cell that surrounds and encloses its contents of cytoplasm and nucleoplasm. The cell membrane separates the cell from the surrounding interstitial fluid, the main component of the extracellular fluid.

Explanation:

Unicellular organisms are made up of only one cell that carries out all of the functions needed by the organism, while multicellular organisms use many different cells to function. ... Multicellular organisms are composed of more than one cell, with groups of cells differentiating to take on specialized functions

6 0
2 years ago
Read 2 more answers
Other questions:
  • How corona virus affected environment?
    9·2 answers
  • Order the taxa from largest (first) to smallest (fifth). 1. first domain 2. second order 3. third kingdom 4. fourth class 5. fif
    10·2 answers
  • Whats the middle layer of the ocean​
    5·1 answer
  • What effect on the rate would you expect if you raised the temperature?
    10·1 answer
  • Electromagnetic waves travel through space at a speed of
    6·2 answers
  • What advance in technology made the discovery of cells possible
    13·2 answers
  • Mltochondria are the<br> of the cell.
    12·2 answers
  • What will most likely happen if a new producer is introduced into a food web? A) The omnivores will decrease. B) The herbivores
    5·1 answer
  • I need help ASAP marking braniiest
    5·1 answer
  • 20. What is the difference between adaptation<br> and evolution?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!