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
Scavengers help break down or reduce organic material into smaller pieces. These smaller pieces are then eaten by decomposers. Decomposers eat dead materials and break them down into chemical parts. ... They break down the organic material and recycle it into the ecosystem as nutrients.
Figure 1.1 shows its four main stages:gap 1, synthesis, gap 2, and mitosis.Gap 1, synthesis, and gap 2 together make up what is called interphase. The stages of the cell cycle get their names from early studies of cell division. ... They also carry out cell-specific functions in G1 and G2.
