The correction option is A.
Reproductive isolation is divided into two major classes, which are prezygotic and postzygotic isolation. Prezygotic isolation refers to the barriers that are present before the egg can be fertilized while postzygotic isolation refers to those barriers that are present after the egg has been fertilized. Mechanical isolation is a type of prezygotic isolation. Mechanical isolation is a type of reproductive barrier which exist because the male and the female genitalia have different sizes, shapes and locations. The snails that coil to the left and those that coil to the right have the locations of their genitalia in different places.
Answer:
a vegan dinner could be a meat free burger with vegan cheese and fries with a side of salad. a snack could be hummus with sliced veggies. a benefit of the vegan diet is reduced risk of high blood pressure and reduced risk of illnesses related to meat-based diets such as cardiovascular disease (if you eat healthily, unhealthy vegan meals are becoming more common.) a risk is that yiu need to keep a close eye on your diet. removing all animal products means you risk not getting enough nutrients from things you would normally eat and need to research lots of supplements. as foods such as tofu are becoming more popular, veganism is becoming less benefitial for the enviroment. forests are cleared to make way for tofu and meat substitute plantations. after humdreds of years, some animals need human interference. if we stop removing honey from domesticated bees hives, they will be unable to survive. if we juat didnt interfere from the start they would not need it, but back then we had no choice.
Yep, very slowly but constantly shifting
Answer:
An electron in an excited energy level of an atom will always drop to lower energy levels, emitting very specific wavelengths of light in the process.