ANSWER:
Index Fossils can be used to identify a specific period of time
I believe the term for two similar chromosomes would be homologous chromosomes.
The right option is; They allow the body to react to stimuli.
Nerve cells, (also called neurons) are specialized cells that are found in their millions in the nervous system. Nerve cells are created to stimulate other cells in the body. They transmit messages in the form of electrical signals within the body, and they allow the body to respond to stimuli. Neurons are grouped into three types which are; sensory neurons, motor neurons and association neurons.
Pre-embryonic cleavages make use of the abundant cytoplasm of the conceptus as the cells rapidly divide without changing the total volume.
I believe the answer is Gene splicing because they remove specific genes in order to create a transgenic organism.
I hope this helps!
