Sponges belong to which one among the following phylum?
Porifera
Explanation: **Sponges** belong to the phylum **Porifera**, which are simple, multicellular animals.
A married couple adopted a male child. A few years later, twin boys were born to them. The blood group of the couple is AB positive and 0 negative. The blood group of the three sons is A positive, B positive, and 0 positive. The blood group of the adopted son is
The normal systolic pressure in human beings is: