The present giraffe has a long neck as compared to
its ancestors. it could be due to
(a) natural selection
(b) isolation
(c) speciation
(d) inheritance of acquired character

Which of the following claims does the author support the least

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.

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic