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
Mademuasel [1]
3 years ago
7

A land form characterized by high elevation and a more or less level surface is called a

Biology
1 answer:
just olya [345]3 years ago
3 0

Answer: plateau.

Explanation:

You might be interested in
Treating depression
pantera1 [17]

H: Schizophrenia

Hope this helps

8 0
3 years ago
30points Help me
Solnce55 [7]

Answer:

A) Adenosine triphosphate, or ATP, is an organic compound that provides energy for many different metabolic processes. In the chloroplasts, ATP is a product of the first stage of photosynthesis, and it provides energy for the second stage. NADPH is an energy-carrying molecule created during the first part of photosynthesis when chloroplasts convert light energy into chemical energy. NADPH provides the energy needed for plants make sugar from carbon dioxide in the second stage of photosynthesis.

B) In photosynthesis in presence of sunlight plant utilizes carbon dioxide and water to produce carbohydrates and oxygen.   And the Oxygen is released out by the plant during day time.  The released Oxygen is utilized by the living organism and undergo the process of respiration.

C) There is no one “most important” enzyme, but Rubisco is the catalyst that plants use to fix atmospheric carbon into biomolecules as part of photosynthesis. It is hyperabundant, representing a significant proportion of soluble protein in leaves, and is thought to be the most abundant protein on Earth.

Explanation: sorry its so long

8 0
3 years ago
Water leaves and enters cells in what process?
abruzzese [7]
Hydrolysis, the diffusion of water across the cell membrane. 
8 0
3 years ago
Salmon eggs hatch in fresh water. The fish then migrate to the ocean (a hypertonic solution) and, after several years of feeding
Ray Of Light [21]

Answer:

Letter C

Explanation:

Salmon have a physiological adaptation that allows osmoregulation to occur in two different environments (seawater and freshwater). There are specific molecules in the salmon gills that "pump" and "remove" Na and Cl ions. When at sea these molecules pump the ions out of the salmon's body and into freshwater, the same molecules remove Na and Cl from the water bringing it into the animal's blood.

3 0
3 years ago
Are viral infections curable? Why or why not?
Anna11 [10]

Answer:

no.

Explanation:

Viruses, on the other hand, are not cellular. We can't kill them simply by disrupting their cells. They are infective nucleic acids which cannot replicate outside of living cells. They must invade a human cell to reproduce, because they cannot produce energy or synthesize molecules on their own. Some viruses replicate inside human cells and then bud off from the human cell inside an "envelope" made from the human cell's own membrane, which helps them evade the immune system on their way to infecting another human cell. Many viruses are protected by protein capsids, which are extremely protective--unlike a bacterial cell wall or membrane, the virus doesn't have to be alive inside the capsid or exchange nutrients and waste with the environment across the capsid; the capsid is merely there to protect the nucleic acid of the virus.

Viruses need to match some sort of receptor in order to gain entry into human cells, and in some viruses, this receptor is one of the few good targets for drug therapy; however, unlike antibacterials, the drug will only work for that particular virus/receptor, because each virus uses a different receptor.

Viruses spend time inside human cells, which protects any outer antigens from some of the aspects of the immune system. There are times when viruses are especially vulnerable during replication, but there are reasons they are harder than bacteria to target with these antireplication drugs: 1) unlike for most bacteria, the drugs need to be small enough to enter the human cell where the virus is replicating, 2) unlike for most bacteria, the drugs can't simply target a protein shared by most viruses; furthermore, many viruses hijack human proteins which cannot be targeted. Overall, there are comparatively few antiviral drugs compared to antibiotics because of the huge difficulty in obtaining selective toxicity. And 3) most drugs available target a certain step of viral replication for a certain family of viruses; however, by the time the patient shows symptoms, the virus has already created countless copies of itself or become latent in human cells, and at that point it is too late for most of the antiviral drugs to be super helpful since they target the replication itself. Even when a good antiviral drug is developed, most of them work only against a single species (or at best, a family) of viruses, which is not the case for most antibiotics.

Many viruses don't spread in ways where they can easily targeted (Polio moves from the GI tract to lymph nodes and then to the blood stream on it's way to the spinal cord to cause paralysis; it is vulnerable to the immune system in vaccinated individuals while it is forced to travel in the blood. In contrast, some viruses like rabies, herpes, and varicella-zoster spread through neurons in order to evade the immune system. Other viruses form syncytia because they travel directly from cell to cell). Also remember that some viruses integrate themselves into human DNA and remain latent for long periods of time, which prevents them from being cleared by drugs or the immune system. The human immune system does have its ways of dealing with viruses, which I can get into in greater detail in another post. For certain viruses, the only way we have to treat them is to use interferons to ramp up the immune system (a very unpleasant therapy which must often be maintained for very long periods of time).

One of the reasons that vaccines for some viruses are not effective is that oftentimes, a live (attenuated) vaccine cannot be made for those certain viruses since the reversion mutation rate is too high to provide an acceptable risk; for many viruses, only killed strains can be used, if at all. Without a live attenuated virus strain multiplying inside cells, certain critical aspects of the immune system are not activated against these certain viruses. In cases where killed viruses are able to be used as vaccines, the protection is lesser (for instance, no type-switching to IgA antibodies which would be more effective than IgM) and shorter-lived.

7 0
3 years ago
Read 2 more answers
Other questions:
  • In a certain species of parrot, having yellow feathers is a dominant trait and having green feathers is a recessive trait. A hom
    11·1 answer
  • Why is the genetic code common to all organisms?
    8·1 answer
  • Which of the following statements about diodes and triodes is correct?
    5·2 answers
  • How do the bones, muscles and sensory organs work together?
    14·1 answer
  • Cystic fibrosis is a hereditary disease The cystic fibrosis rocossive. What does this mean
    15·2 answers
  • The production of haploid(N) gametes is the main purpose of __________.
    12·1 answer
  • Which best describes what is happening in the area
    11·2 answers
  • What are the three main areas of study within anatomy?
    5·1 answer
  • Are there any parts of the human body that get oxygen directly from the air and not from the blood?
    11·1 answer
  • A list of different ions is shown. Which combination of ions will result in an ionic bond?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!