Answer: Low, High, Lac repressor
Explanation:
The expression of the lac structural genes is low when lactose is absent from the culture medium and is high when lactose is added, because lactose binds to the lac repressor and inactivates it.
When Lactose is present the lac genes is expressed because the substrate lactose act as inducer and binds to the lac repressor and inactivate it. So the gene is expressed.
But in the absence of lactose, the lac repressor binds the DNA and prevent the expression of the lac genes
The main difference between haploid cells and diploid cells is diploid cells have two complete sets of chromosomes, while haploid cells only have one complete set of chromosomes.
Answer:
That's what I had so far. 2) a. Lungs b. Closed
3) CO2 / Oxygen
Plicae, villi and microvilli increase the surface area for he absorption of nutrients
Answer:
It wouldn't completely disrupt the system but, it'd make some major changes. Removing a species would be like removing a piece in the game of bricks. More bricks you'd remove the more unstable it'd get. So, I'd say don't remove any species from ANY ecosystem, for the safety of the world. If one ecosystem is disrupted, an entire species could die off. If one dies off, so would another and it'd keep going.
Hope this helped, have a good day!
