Question

Nuclear membrane is absent in
a) Monera
b) Protista
c) Fungi
d) Plantae

Answer 1

Hint: The most primitive and most simple organisms contain DNA but lack nucleus and other cell organelles. These are single celled and are prokaryotic in nature.

Complete answer:
Kingdom monera is solely composed of bacteria. Bacteria are abundant on earth and occur almost everywhere. Bacteria are classified under the Kingdom Monera because they are prokaryotic organisms that lack membrane-bound organelles like Endoplasmic reticulum, golgi bodies etc.
Bateria is subdivided into 2 types:
1) Archaebacteria: These bacteria live in harsh habitats like extreme salty areas- halophiles, hot springs- thermoacidophiles, and marshy areas- methanogens. Archaebacteria differ from other bacteria because they have a different cell wall structure which enables their survival in extreme conditions. Methanogens are found in the gut of ruminant animals and they are responsible for the production of methane (biogas) from the fecal matter of these animals

2) Eubacteria: There are also known as ‘true bacteria’. They have a rigid cell wall, and have motile flagellum. The cyanobacteria have chlorophyll which is similar to green plants and are photosynthetic autotrophs. Heterotrophic bacteria are abundant in nature and are found almost everywhere. These bacteria are important decomposers.

So, the correct answer is ' Monera'.

Note:
The nucleus is the membrane bound organelle in which the genetic material of the organism is kept inside the double layered nuclear membrane. It protects the DNA from getting exposed to the harsh conditions of the cytoplasm of the cell. Except in Monera nuclear membrane can be found in the other kingdoms.