Answer: Option B
Explanation:
The DNA technology can be defined as the process by which a small manipulation in the genetic material can lead to the production of the products that is very important for the welfare of the society, science and medicine.
The golden rice is an example of genetic engineering which produces the precursor for the synthesis of vitamin A in the body.
This crop is produced by genetic engineering and is very high economic and nutritive value.
Answer:
healthy foods cost more.
unhealthy foods are more desirable.
they eat from vending machines in schools.
All of these answers are correct.
Explanation:
The best answer is C.
Chloroplasts are not found in all eukaryotic cells but only in plant cells. Animal cells are eukaryotic in nature but animals do not have chloroplasts in their cells because they do not engage in photosynthesis.
Photosynthesis is the process by which plants make their own food. Chloroplasts contain chlorophyll which is essential in t trapping sunlight from which supplies the energy for photosynthesis.
Animals do not make their own food like plants but eat ready made food so their cells lack mechanisms for food manufacture.
Answer: hybridisation between related species is unlikely to contribute to adaptive speciation.
Explanation: any population has natural genetic variation. The available resources are insufficient for all plants (and conversely, not all offspring survive). Natural selection favours variations better suited to the conditions.
Although hybridisation is more common in plants than animals, and can lead to speciation, adaptive radiation from an ancestral species is the general response to environmental change, such as from rainforest to savanna. There is low probability of selective advantage from hybridisation of two ancestral species adapted to niches within the original habitat when the conditions in those niches changes significantly.
I) from the information given, that the rate-limiting step is unimolecular with A as the sole reactant, the rate law of the reaction is therefore;
Rate = k[A]
If you double the concentration of A, the rate of the reaction wil also double to 0.008 M/s
ii) The concentration of B has no effect on the rate of reaction, and therefore halving the concentration of B, will not change the rate of reaction. Thus the reaction rate remains 0.0040 M/s
iii) Increasing the concentration of A by 4-fold also increases the rate of reaction by 4-fold to (0.0040 ×4) = 0.016 M/s. This is because the rate of reaction depends on the concentration of A, therefore any change in this concentration affects the rate of reaction, such that an increase in the concentration of A cause a corresponding increase in the rate of reaction and vice versa.
