Answer:
It is "The opening of flask is pointed in an unsafe direction"
Explanation:
The students were there in the lab to perform practical without obeying the safety rules. The most reasonable basis for teacher's warning here, in this case, is the flask which is pointed in an unsafe direction. It is not specified whether the flask is containing any chemical or not but even if it is empty, it might just fall and break and create injury to anyone present in the lab because, the students are also not wearing proper laboratory wear in accordance to the safety rules which include lab coats, gloves, eyewear, etc. Also, some Students have not tied their hair and more importantly the flasks carrying liquids are not labeled. All of these things might end up in a critical situation for which the teacher warned students about it all.
Answer:
Hazel - 1/4 or 25%
Green - 1/2 or 50%
Blue - 1/4 or 25%
Explanation:
First, let us carry out the cross between AaBB and Aabb using a Punnet's square. The result is as below:
AABb - 4/16
AaBb - 8/16
aaBb - 4/16
(See the Punnet's square analysis in the attached image).
<em>AABb genotype has 3 pigments, hence, would be hazel.</em>
<em>AaBb genotype has 2 pigments, hence, would be green.</em>
<em>aaBb has one pigment, hence, would be blue.</em>
Expected progeny:
<em>Hazel - 1/4 or 25%</em>
<em>Green - 1/2 or 50%</em>
<em>Blue - 1/4 or 25%</em>
Explanation:
DNA polymerase replicates the DNA supplied to all new cells produced while RNA polymerase drives DNA copy RNA synthesis. Unless corrected, error in DNA replication could result in the transmission of the error DNA to all next-generation cells.
Protein synthesis error will cause faulty copies of RNA and degraded proteins. To order to ensure the transfer of key genetic information to future generations of cells, failure to DNA replication must be corrected.
Answer:
C. A chlorine breaks off and forms a free radical
Explanation:
When CFCs are exposed to high levels of UV radiation in the atmosphere, the CFC molecule breaks into chlorine and forms free radicals.
These free chlorine radicals then reacts with ozone molecules and breaks the ozone atom (O3) to form chlorine monoxide and oxygen (O2) molecule.
CFCs are main cause of ozone depletion in the atmosphere.
Hence, the correct option is "C".
One disadvantage of having a large surface area to volume ratio is the heat loss. An organism that has larger surface area has high rate heat gain and heat loss. Therefore they need to eat or acquire nutrients faster in order to sustain life.
