Your lac operon is expressed.
You have not consumed lactose from dairy recently,
None of the above.
Answer:
You have not consumed lactose from dairy recently
Explanation:
According to the diagram, there is a represssor element in the regulatory region of the operon. This repressor is blocking the RNA polymerase, that is bound to its promoter region upstream of the genes, from transcription. The repressor is mostly the lac repressor that switches of the operon in the absence of lactose.
Answer:
The flow of energy in the ecosystem is generally unidirectional and there is loss of energy across each trophic levels successively.
Explanation:
The entry of energy occurs in the form of sunlight which is process by the plant through photosynthesis resulting in formation of nutrient essential for survival of plants. This plant energy then moves to the living organism feeding on it such as primary consumer. Here most of energy is used up and some energy is lost as heat. Likewise in the case of secondary consumers and tertiary consumers energy is used up with loss of some energy as heat at each level. The energy flow is unidirectional in the sense that it cannot be used back by the plant from the consumer levels. Thus the energy flows successively with loss at each level as heat.
B. The genetic offspring are exactly like the parent cell.
C. There are 23 chromosomes from each parent cell passed on to the offspring.
D. Meiosis goes through 2 stages of division, Meiosis I and II.
Answer:
I would say it is B.
Explanation:
In Meiosis, specifically in Prophase 1, it creates genetic variation. Crossing over occurs in that stage
Answer:
Toucans, frogs, snakes, and lizards are biotic influences in tropical rainforests.