Geologist finds four layers of sedimentary rock. she determines that no geologic events have shifted the layers. she labels the layers a, b, c, and d from the top to the bottom. which statement about these layers is accurate? a is older than b. b is older than c. c is younger than a. b is younger than d.

The answer is; B is younger than D

In sedimentary rocks, the bottom layers are older that overlaying layers. This is because sediments are placed on top of each other by surface runoffs to ocean beds. Therefore, the first sediments to be deposited will always be towards the bottom as more and newer ones are brought in and deposited.

B is younger than D.

Correct Cotyledons

Monocots have only one cotyledon in their seeds while the dicots possess two cotyledons. Both of them are flowering plants. Monocots have parallel veins while dicots have reticular vein. Stem. Monocot stems have scattered vascular bundles.

Example of monocots include corn, onion, while that of dicots include beans, peas etc.