The presence of a controlled substance must be proven in both the blood and the organs before it can be considered as a cause of death.
A controlled substance is the one that is prohibited or available under strict regulations by the law of a country or state. These are usually the drugs that can result in addiction or serious diseases in an individual. Such substances are only available for medicinal purposes.
Blood is a red colored fluid present inside the body. It is red due to the presence of a pigment called hemoglobin. The blood is responsible for the transport of substances across the whole body, like oxygen, hormones, carbon dioxide, waste material, etc.
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Answer:
D. A bicycle rusting.
Explanation:
A. is incorrect because tearing a piece of paper is a physical change, not a chemical change.
B. is incorrect because we are just heating up the object. That only changes how fast the particles are moving and the change in state of matter.
C. is incorrect because we are adding heat to change a state of matter (from solid to liquid) and it is a physical change.
Therefore, only D. is the correct answer. Iron rusts, and when it does, it chemically changes into an iron oxide (rust).
Answer:
The correct option is <em>C. A gene is a specific segment of DNA on a chromosome</em>
Explanation:
Option A is false because a gene is a segment on a chromosome.
Option B is false because a chromosome carries many genes.
Option D is false because a gene carries a segment of DNA, not all of the DNA.
Option C is correct because there are many genes present on a single chromosome. Each gene carries a segment of DNA. The position of a gene on the chromosome is known as its loci.
The answer is 3. During dehydration synthesis and enzyme joins two monomers water is a byproduct
