Answer:The Ozone Hole. One billion years ago, early aquatic organisms called blue-green algae began using energy from the Sun to split molecules of H2O and CO2 and recombine them into organic compounds and molecular oxygen (O2). ... As oxygen in the atmosphere increased, CO2 decreased.
Answer:
*first attempt the questions , it will give u a good sense of how the questions can come
*read every chapter very throughly
*this may sound wierd but . imagine ur a teacher in a classroom and explain the chapter to ur class and take a quiz ( but its on urself) if they ( you) answer correctly then ask why
this is the correct way of revising any chapter , it works for me perfectly.
it is said that if u teach someone something , u are more likely to remember it ( in this case ur imaginary students)
if you study like this , u wont need any extra material
hope it helps ,pls mark me as brainliest
Answer:
If a pea plant has a recessive allele for green peas, it will produce... green pease if it does not also have a dominant allele for yellow peas. When Gregor Mendel crossed a tall plant with a short plant
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