the membrane receptors are activated when a certain chemical attaches itself to the receptor.
Answer: The correct answer is- B)They are single cells that lack a nucleus and tend to live in extreme conditions.
Archaebacteria are the oldest life forms, which are found on earth. They are unicellular ( made up of one cell) prokaryotes ( lacking nucleus and membrane bound subcellular organelles) belonging to the kindom, Archea. They are found in extremely harsh environmental conditions such as hotsprings, boiling mud surrounding volcanoes.
Example- Methanogens, halophiles.
Thus, option B) is the right answer.
The hedgehog ligans activate it
1. Plasma
2. Platelets
3. Red Blood Cells
4. White blood cells
Asexual reproduction has one parent and are genetically identical as the parent
