Answer:
Explanation:
It certainly isn't the last one. A theory is close to a guess. It fits all the known facts, but there is usually something missing. If someone figures out what is missing, usually by experiment, then the theory become a fact.
The rest of them (1 2 an 3) can all be true. 3 is the least viable. You have to be able to come up with a counter example to reject a theory.
I'm not sure about 2. New phenomena can still be part of current theories. Reluctantly, I wouldn't choose 2 because
1 is the best answer of a very poor lot. Do not be surprised if you use it, that it turns out to be wrong.
The double helix is a description of the molecular shape of a double-stranded DNA molecule. In 1953, Francis Crick and James Watson first described the molecular structure of DNA, which they called a "double helix," in the journal Nature.
The original question has a set of choices. This is within the context of cell division. The choices are:
A. A cell in G1 of interphase and a cell in G2 of interphase
B. A cell in G1 of interphase and a cell immediately after the completion of meiosis II
C. A cell in G1 of interphase and a cell in metaphase II of meiosis
D. A cell in G2 of interphase and a cell in metaphase II of meiosis
<span>E. None of the above.
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The correct answer is C. A cell in G1 is diploid and the cell in meiosis II is haploid but the amount of DNA still equivalent as each chromosome in the haploid cell consists of two chromatids. G2 cells already had been through the S phase therefore the genetic material is already doubled. A cell immediately after meiosis II has half the genetic material.
Answer:
The correct options are: stomach, mouth, eyes, skin
Explanation:
Eyes: Our tears contain an enzyme which is beneficial in breaking down the cell wall of many bacteria's.The blinking of the eye also stops many bacteria's o enter into the eye.
Skin: The skin of a person acts as a barrier between any foreign pathogen and the body of a person. The hair present on the skin tend to trap many microorganisms and prevent them from entering into the body.
Mouth: Our mouth produces saliva which has many enzymes to kill pathogens in food.
Stomach: The stomach acids tend to kill any pathogens which enter through swallowing.
Answer:
Carrying Capacity
Explanation:
The definition of carrying capacity in relation to biology is, "the number of people, other living organisms, or crops that a region can support without environmental degradation."
