You want to test Charles Darwin's prediction that an orchid with long pollen tubes has a pollinator with long, thin mouthparts t
hat can reach the bottom of the elongated nectar tube. You place nets over some orchids, which allows pollinators with small, short mouthparts to enter but prevents the entry of pollinators with long, thin mouthparts. Next, you compare the number of seeds produced by plants with and without the nets. In this experiment, seed production is a(n) _____
The scientific experiments are performed to study the variables which are of two types: independent variables and dependent variables.
The independent variables are the variables which can be controlled and changed and the variable to be studied is known as the dependent variable.
In the given experiment to study the prediction of Charles Darwin the experimental groups were divided to study the number of seeds produced. Nets were used to prevent the pollination by long mouth tube pollinators and allowed short mouth tube pollinators.
Since the number of seeds produced was studied will be known as the dependent variable and hence is the correct answer.
Continents are the seven main divisions of land on Earth. A continental shelf extends from the coastline of a continent to a drop-off point called the shelf break. From the break, the shelf descends toward the deep ocean floor in what is called the continental slope.
Answer: The atom of carbon is able to form macromolecules because it has only four electrons in its outer shell. This is the reason why it can bond with four other carbon atoms. The bonds that it forms with other carbon molecules are very stable.
Explanation: I did my research and i also took Science class. :)
