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Vlad1618 [11]
3 years ago
14

How do we know the oxygen released in photosynthesis comes from water?

Biology
1 answer:
Bond [772]3 years ago
8 0
Hello! The answer to your question is: O18 is a heavy isotope that was used as a tracer, and only when the H20 was the source of O18 would the O2 released be labled with the isotope.


I really hope this helped you! c:
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What is the occupational disease caused by inhalation of black dust?
Marianna [84]

The correct answer is pneumoconiosis.

The occupational disease is the disease, which is acquired through the occupation.

The coal workers, especially those who work in mines are regularly in contact with the coal dust, which is also called as black dust. This black dust can accumulate inside the lungs of the coal workers.

The accumulation of the black dust causes the pneumoconiosis. It can lead to coughing, shortness of breath and fibrosis of lungs.

8 0
3 years ago
Plant Tissue Types- List the 4 types of plant tissue and their function
lorasvet [3.4K]

Answer:

ground tissue- is the most common type of plant tissue found in the interior of the plant and can support, store and provide photosynthesis for the plant. Made up of 3 basic plant cells ( Parenchyma, Collenchyma, and Sclerenchyma cells)

dermal tissue- Provides cover and protection for plant. Usually found on the outside similar to skin. Epidermis cells make up the dermal layer and secrete a waxy substance called the cuticle that also protects the plant.

vascular tissue- includes xylem & phloem and helps with water and food transport. The xylem and phloem are kept together in vascular bundles running throughout the ground tissue.

meristem tissue- is growth tissue. This tissue made up of rapidly dividing cells and can be found at the tips of the roots and stems of plants. the growth areas of tips of roots and stems is called APICAL MERISTEM and the secondary growth that makes a plant wider is called LATERAL MERISTEM.

Explanation:

7 0
3 years ago
The Neanderthal skeleton known as the "old man" showed evidence of many injuries over a long life. Several broken bones had heal
Citrus2011 [14]
The answer is C: <span>The Neanderthals cared for the wounded and the elderly. The fact that the skeleton showed signs of broken bones that had healed indicated that the individual had been nurtured back to health after injury. The loss of teeth showed that the individual had lived to an old age.</span>
3 0
3 years ago
Which of the following uses a nonrenewable energy resource to generate energy?
Nata [24]
I think the correct answer from the choices listed above is option C. It is the fireplace that burns wood that should be considered as a <span>nonrenewable energy resource to generate energy. This is because wood is used up when burned and it cannot be obtained back once used.</span>
6 0
4 years ago
Suppose that enzyme X catalyzes a reaction that involves the breakdown of a molecule. The product of this reaction is an amino a
vesna_86 [32]

Answer:

Protein

Explanation:

  • An enzyme is a biocatalyst that plays an important role in increasing the speed of the chemical reactions that occurs in the body.
  • If the enzyme is catalyzing a reaction where the product is broken down into amino acids, then this reaction is a type of decomposition reaction.
  • In a decomposition reaction, a substrate is broken down into the products that constituted it.
  • Since amino acids join to form a protein thus, the molecule that is being broken down in the reaction must be a protein.
4 0
3 years ago
Read 2 more answers
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