Haploid; reproductive
After the halving of chromosomes, the cell becomes a haploid and this is done for gametes, or reproductive cells.
Answer:
a. Mammalia
Explanation:
Mammalia are the class species that have distinct systems and separate ducts for different activities like reproduction, excretory, and defecatory and moreover they have nipples to feed their young ones.
So, the above species which has a single duct for reproductive, excretory, and defecatory material as well as a lack of true nipples does not belong to Mammalia
Answer:
False
Explanation:
A virus (which is a pathogen) has a lot of antigens on its surface, so they can't be used interchangeably.
There are seven different types of air masses.Hope it helped you.If it helped please mark as the Brainliest