In prehistoric times volcanic eruptions caused mass extinctions of many species of marine organisms attached to the ocean floor. what is the most likely reason for this? a) volcanic eruptions change the ph and temperature of the ocean. b) in prehistoric times, there were very few species of marine organisms. c) in prehistoric times, most volcanic eruptions took place on the ocean floor. d) volcanic eruptions remove all traces of dissolved oxygen in the waters of the oceans. eliminate

A). Volcanic eruptions change the pH and temperature of the ocean.

Explanation:

Volcanic eruption from an oceanic floor likely to release gases, sediments which can be of high temperature. The sediements will increase the turbidity in the water and will change the pH and the high temperature may not be tolerated by plants and animals. This may be the result of extinction of many species of marine ecosystem.

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).