Question

Endogenous budding occurs in:
A. Hydra
B. Marine sponge
C. Freshwater sponge
D. Obelia

Answer 1

Hint: Endogenous budding is the process when the bud develops inside the parent body. Sponges belong to the phylum Porifera. They reproduce by sexual and asexual mode. The asexual mode involves budding. Endogenously developing buds are called gemmules. It occurs in both freshwater and marine (few) habitats.

Complete answer: 

> Endogenous budding is the process when the bud develops inside the parent body. The asexual mode involves budding. In budding, a new organism develops from a bud due to cell division at one particular site of the parent body. In sponges, a part of the parent body produces internal buds known as gemmules which separate from the parent body and form a new organism.
-Hydra reproduces asexually through a process known as budding. Budding is the most common mode of reproduction for Hydra. During budding, a small bud develops near the basal part of the parent Hydra.
-Sponges reproduce by both asexual and sexual means. Most poriferans that reproduce by sexual means are hermaphroditic, producing eggs, sperm at different times. Sperm are frequently released into the water column.
-Obelia longissima is dioecious, producing male and female medusae. This medusoid stage lasts for 7 -30 days. Fertilization is external with both eggs and sperm being released into the sea.

Hence, the correct answer is Option C.

Note: Freshwater sponges are delicate sponges that grow on submerged things in clean water bodies like lakes, rivers. Examples include Spongilla lacustris, Demosponge. Grows on the under rocks and logs in natural lakes at depths ranging from 40-90 cm. it does not have a specific diet. Filters feed on particles or organisms such as algae, diatoms, other microorganisms.