In the last few centuries, the number of species becoming extinct on earth has
a. decreased dramatically
b. decreased slightly
c. increased slightly
d. increased dramatically

The correct answer is d.  increased dramatically

Explanation:

In the last century, nearly 500 species got extinct mainly because of the destruction of their natural habitat caused by human beings.  

Humans cut down the forest for making land for agriculture and homes. According to World Wildlife Fund every year earth loss 18.7 million acres forest due to human influence which is the home of thousands of animal and plant species.

The natural rate of extinction is 9 species but in the last century, almost 500 species got extinct which shows that In the last few centuries, the number of species becoming extinct on earth has increased dramatically.

ans.

gregor john mendel is known for study of inheritance in pea plants. he used garden pea plant for his study, having alternative traits for various characters. he performed cross-breeding in pea plants to check how characters are transmitted between parents to offspring, such as cross between pure tall and pure dwarf plant. mendel studied the inheritance patterns in pea plants for various generations.

thus, the correct answer includes options and f).