There is obviously not a definite number because there are so many kinds of insects that we are not familiar with yet. However, approximate numbers mention as low as 2 million up to as high as 30 million. Scientists cannot still determine the correct number, but it is somewhere between 2 and 30 million species.
Answer:
the connective tissue connects the muscle to the bone
There are no options given to choose from. I think you wanted to know whether the statement in question is true or false. Based on this assumption, i am answering this question and hope that it helps you. It is completely false statement that during plant cell differentiation, leaves and roots develop sporadically in an unorganized manner.
Stem cells can differentiate into any type of cell so they can be used to produce/repair nerve tissues. Advantage of using embryonic stem cells is that they are easier to extract than adult stem cells.