Because the rock is laid down over time, the oldest rock (and fossils or whatever) will be in the lowest layer. As you go up, the age decreases - you are looking at younger rocks.
This doesn't tell you the *absolute* age of the rocks - you can't say from this evidence whether they are 100 million or 500 million years old. But you can see changes over history and you can get an ordering in time.
The biological evolution of the species on Earth started with the inorganic molecules which reacted with somehow the changes in environment forming the right conditions for life to flourish.
Thank you for your question. Please don't hesitate to ask in Brainly your queries.
Suppose that a dominant allele (P) codes for a polka-dot tail and a recessive allele (p) codes for a solid colored tail. In addition, suppose that a dominant allele (L) codes for long eyelashes and a recessive allele (l) codes for short eyelashes. If two individuals heterozygous for both traits (tail color and eyelash length) mate, the probability of the phenotypic combinations of the offspring will be in the ratio, D. 9:3:3:1 ratio (9 polka-dot tails and long eyelashes, 3 polka-dot tails and short eyelashes, 3 solid tails and long eyelashes, 1 solid tail and short eyelash).
The solution is found by solving a Punnett square shown in the image.
Answer:
Mainly the root nodules serve as a home for nitrogen fixation
Explanation:
Unsaturated fats are healthier if eaten in healthy doses they lower LDL cholesterol levels and reduce risk of heart disease