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Mama L [17]
3 years ago
14

Determine which type of property each statement describes by typing “physical” or “chemical” in the blank

Biology
2 answers:
Semmy [17]3 years ago
7 0

Answer:1. physical property.  

2. chemical property.

3. chemical property.

4. physical property.

Explanation:

Physical property is defined as the property which can be measured and whose value describes the state of physical system. For Example: State, density etc.

Chemical property is defined as the property of a substance which is observed during a reaction where the chemical composition identity of the substance gets changed.

1. Hydrogen is a colorless, tasteless, and odorless gas : physical property as there is no change in chemical composition

2. Hydrogen is very combustible in the presence of oxygen :chemical property as there is a change in chemical composition

3. Hydrogen is very reactive with most elements :chemical property as there is a change in chemical composition

4. Hydrogen is the least dense of all elements : physical property as there is no change in chemical composition

lilavasa [31]3 years ago
5 0

Answer:

physical

chemical

chemical

physical

Explanation:

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After DNA fragments with matching sticky ends are temporarily joined by complementary base pairing, the union can be made perman
STatiana [176]

Answer:

The correct option is b. DNA ligase

Explanation:

DNA ligase is an enzyme that joins DNA fragments. If two DNA fragments or molecules have complementary ends, the ligase can join them together to form a single and intact DNA molecule, without interruptions. This is because the ligase enzyme seals the space between the molecules to form a single DNA fragment.  

The others enzymes have different functions:

DNA helicase is characterized by separating DNA from double strands into single strands and acts in DNA replication.

ATP methylase plays an important role in DNA replication when determining the beginning of replication that has already been replicated or not.

DNA polymerase is an enzyme that is responsible for catalyzing the polymerization of the new strand of DNA during the replication of this molecule.

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Elevating a shock victim feet will help his or her circulation. <br> a. True <br> b. False
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Explain why most farmers use stem cuttings to plant new fruit trees rather than plant seeds.
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The main reason that most farmers use stem cuttings rather than just planting a seed is that a tree's genetic variation will occur. The seeds of many fruit trees tend to vary differently from the parent, because seeds themselves are produced by sexual reproduction (i.e they receive genes from a male and female to form). As they are a cross from two sets of genes, many fruit trees are not “true to seed”. Their seeds will produce a generally different variety of tree from the parent. When using stem cuttings, it's almost like a cloning process.

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This can be justified by the mating patterns of the female peacocks. They do not choose their mates randomly but look out specifically for bright attractive plumage in their male partners and then select them.

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