4 fertilization can occur only after pollination
Industrial melanism is an evolutionary effect prominent in several arthropods, where dark pigmentation has evolved in a habitat affected by industrial pollution, including sulphur dioxide gas and dark soot deposits.
Answer:
Nonmetallic
Explanation:
I just took the assignment and I am Big Brain.
Answer:
this tree tells us that the amnion is found in mammals, lizards, snakes, crocodiles, and birds
Explanation:
The controlled experiments are performed by the scientists, when they want to study the changes in the sample on changing a single variable. So, the correct answer is option (b).
In case, all variables are kept same, no changes would be observed in the experiment sample. A controlled experiment can be performed on living thing as well as non living. But, controlled experiment cannot be performed on the things which are influenced by a lot of variables, as they cannot create realistic results. So, the option (a), (c), and (d) are incorrect.
