<span>A scientist is determining the age of a rock by comparing their position to other rock layers. By doing this, the scientist is determining the relative age of the rock. </span>
Answer:
hox genes are a subset of regulatory genes that encode transcription factors and they are important for embryonic development. they are activated by a cascade of regulatory genes and the proteins encoded by the early genes regulate expressions of later genes
Explanation:
Technically they're found on chromosomes which are in the nucleus
The correct answer is option B
The structure of the sperm is divided into three parts head, body and tail. The head region consists of many enzymes and the tail region of the sperm helps in providing mobility to the sperm.
The structure of tail adds propelling movement by whipping and undulating the sperm. The sperm moves through the reproductive tract to reach the egg.
