Answer:
So they are lighter and move quicker.
Explanation:
With the small wings and bodies birds have it would be hard for them to escape predators and lift their own weights if their bones were dense like humans' bones. The hollow part of the birds' bone is connected to their lungs so they have enough oxygen to fly easily. Hope this can help you! :)
Answer:
c. she could get toxoplasmosis
Explanation:
she would be exposed to cat litter; cat litter usually carries those parasites that cause toxoplasmosis.
Gel electrophoresis is a method used for the separation of DNA fragments based on their sizes. We have labelled the steps and you can know the sequence of the steps by going through attached image.
The technique is very important for the molecular analysis and identification of new genes. It is also useful in identification of genetic sequence of a particular gene.
Hope it helps!
Bacteria.
When bacteria are exposed to antibiotics, the antibiotics kill the bacteria that does not have resistance gene while the bacteria that have the resistance gene survive and produce offspring with the gene creating generations of bacteria with a resistance gene. This demonstrates that through natural selection, bacteria are evolving into antibiotic-resistant bacteria. The selective agent is the antibiotic and the main culprits are the humans.