Jellyfish do not have a central nervous system.
Squids which belongs to Cephalopoda (class of Mollusca) have the most complex nervous system of the invertebrates. They have well-developed senses and large brains. So, they are considered as the most intelligent of the invertebrates.
Dolphins, on the other hand, are regarded as one the most intelligent animal.
Answer:
A gene is a segment of DNA, a condensed DNA molecule makes up a chromosome, a chromosome is inside a nucleus, and a nucleus is contained within a cell.
Explanation:
The nucleus is a membrane-bound organelle in the cell where the genetic information is stored. The genetic information is stored in the nucleus.
This genetic information is DNA, a double-stranded molecule made of strings of nucleotides. These nucleotide sequences form genes, which are segments of DNA that code for proteins.
DNA molecules condense to form chromosomes during certain stages of the cell cycle
Most invertebrates leave their young to fend for themselves while vertebrates help their young till they are ready
B 5 years it takes 5 years before symptoms to appear
C because it really doesn’t matter if you wash your hands before because it is recommended to wash them after to prevent any infections or diseases
