Answer:
Point no 2 and 4 are correct
Explanation:
100 points?
Each nucleotide only pairs with one nucleotide
I think verterbrates have a back bone others do not. I only THINK so.
Producers are very important to ecosystem reason being without the producers we would not be able to survive. Producers make their own food by use of sun which turns simple raw materials into food.
Herbivores are consumers who eat only green plants. Omnivores eat animals and plants. Scavengers only eat dead organisms. Scavengers help the environment in that they eat dead organisms and decomposes the broken organic material down to the raw material.
Explanation:
Nondisjunction: Failure of paired chromosomes to separate (to disjoin) during cell division, so that both chromosomes go to one daughter cell and none go to the other. Nondisjunction causes errors in chromosome number, such as trisomy 21 (Down syndrome) and monosomy X (Turner syndrome). It is also a common cause of early spontaneous abortions