7. If the atomic number of an element is 6 and its mass number is 14, how many neutrons are contained in the nucleus?
O A 8
orals
B 14
C20
D 6
cos

Which of the following statements is most likely correct about a rock belonging to the jurassic age and a rock belonging to the cambrian age? options: 1) they have identical fossils of organisms that have evolved over time. 2) both have animal fossils preserved in them due to weathering and erosion. 3) they contain different fossils because life on earth has changed through time. 4) the fossils in them were formed on the surface of earth due to exposure to sunlight.

Using meiosis, the sporophyte produces spores that are .

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above