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
elena-14-01-66 [18.8K]
2 years ago
7

When the oxygen in the air combines with the iron exposed by paint peeling off an old

Biology
2 answers:
ankoles [38]2 years ago
6 0

Chemical. This process is not done physically.

Salsk061 [2.6K]2 years ago
4 0

Answer:

Answer: I think the answer is just water.

You might be interested in
Is blood clotting an example of a positive or negative feedback mechanism? Explain your answer based on the description of the m
serg [7]

Answer:

Blood clothing is an example of positive feedback.

This type of feedback mechanism is useful to the body because it multiplies the factor that intervenes in clotting accelerating the process.

If a toxin affects the molecules that signal for platelets the feedback will not be effective enough to produce clotting and the body will keep bleeding.

Explanation:

Blood clotting is an example of positive feedback due to the fact that when the vascular endothelium is damaged  platelets will go to this area and activate themselves once they are in contact with the collagen fibers of the damaged structure. When the platelets are activated they will release the contents that is stored in their granules. One of the contents is a Gq-linked protein receptor cascade,  that will increase the concentration of calcium in the platelets. Calcium activates protein kinase C, which, in turn, activates phospholipase A2 (PLA2). PLA2  will modifies  an  integrin membrane  increasing its affinity to bind fibrinogen. The activated platelets change their  shape , and the fibrinogen cross-links with the integrin membrane aiding  in  the aggregation of adjacent platelets. After this the coagulation cascade takes place. there are two pathways the extrinsic  and the extrinsic one.

The extrinsic pathway will be activated due to tissular factor released  by the platelets and the intrinsic pathway will be activated due to endothelial collagen. The final product of both pathways is factor x.

Factor x will transform prothrombin into thrombin will activate the conversion of fibrinogen into fibrin. Thrombin will form a net of fibrin that will the clot.

A cascade reaction is useful because every component of the cascade are related making a quick reaction once that one of then is activated and can activate other or more factors.

If a toxin affects the molecules that signals for platelets, platelets will not go to the damaged area and in consequence there will not be thrombin and fibrin to form the clot together with platelets.

7 0
3 years ago
Fill in the blanks to make the following statement true
Arisa [49]

Answer:An inherited, natural selection.

Explanation: Adaptation is the process through which living organisms develop mechanisms this mechanisms may be Inherited to enable them survive competition and other prevailing circumstances. Which can also be environmental, climatic factors etc.

Adaptation helps to ensure the principle of NATURAL SELECTION,where organisms which have been able to develop similar mechanisms or have natural mechanisms that has enabled them to survive the prevailing circumstances in the habitat.

4 0
3 years ago
Options for #2:<br> -carry<br> -design<br> -argue<br> -sabotage<br> -disprove
qwelly [4]

Scientists use labs to Design and Carry out experiments.

6 0
3 years ago
A cross section of a seed is shown.
cluponka [151]

Answer:x is embryo :D

Explanation:

7 0
3 years ago
Question 9
dangina [55]

Answer:

the answer is C

Animals get the nitrogen they need by eating plants or other animals that contain nitrogen. When organisms die, their bodies decompose bringing the nitrogen into soil on land or into ocean water. Bacteria alter the nitrogen into a form that plants are able to use

4 0
2 years ago
Other questions:
  • 2. use the atomic number and atomic mass to indicate the number of subatomic particles​
    6·1 answer
  • A blood pressure of 60 over 80 would indicate that a patient had…
    15·2 answers
  • What causes an annular eclipse?
    15·1 answer
  • Machine generated alternative text: 11) process which requires the calculation of an interval size or the interval is
    7·1 answer
  • The DNA code eventually directs to the cell to manufacture ?
    12·1 answer
  • Jackie was born with _____ , the absence· of long· wavelength cones .
    12·1 answer
  • What is a "start codon"? What is the nitrogen base sequence for the start codon?
    8·1 answer
  • Which of the following are involved in RNA translation? I. mRNA II. tRNA III. ribosomes IV. amino acids
    7·1 answer
  • What is migration? Give an example.
    15·1 answer
  • Qual a principal característica presente em uma célula eucarionte e ausente na célula procarionte?​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!