The cladogram shows the evolutionarily relationship among four species. 1/2 of the species the cladogram is labeled species X

Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?

The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?

Which ideas did your answer contain? check all that apply. no food for organisms no oxygen in the atmosphere no trees or flowering plants no products based on trees or plants (building materials, medicines, fuels, fibers) no fossil fuels