The given blank can be filled with External.
The stimulus is a physical entity, which can provoke the response in the body of an organism. The hiding of the organism under the rock in response to the predator is and a type of external stimuli, as in this case, the organisms hide themselves inside the rock in response to the predator, which is present outside the body of the organism.
When a meteoroid passes through earth's atmosphere, it heats up due to air resistance. The heat causes gases around the meteoroid to glow. most meteoroids that enter earths atmosphere disintegrate before they hit the ground.
You forgot to show us a picture bro
The correct answer is option D, They both lack nuclear membrane
Both Archaea and Bacteria belongs to the prokaryotic and thus have no cell nucleus or any other membrane-bound organelles in their cells. These two are single celled and reproduce through binary fission.
The patellar region has a reflex (when the doctor hits your knee with that little rubber hammer and you kick your leg). Any reflex protects us from harmful things. The kneecap also covers and protects the anterior articular surface of the knee joint.
