Question

Response of unicellular organisms to environmental stimuli is called what among these


1 Relay neuron



2 Taxis



3 Tropism



4 Nastic movement

Answer 1

Answer:Living organisms need to respond to their environment, and more specifically changes in local environmental factors which act as stimuli. If their responses are helpful, they are more successful and they continue to exist. If they do not respond at all or they make a less helpful response then they may suffer problems.

This is essentially an aspect of survival of the fittest which results in the evolution of living organisms to suit their environment, which is a fundamental concept in Biology. The responses are often simply seen as adaptations.

Explanation:

Answer 2

Answer:

Response of unicellular organisms to evnironmental stimuli is called as taxis.

Explanation:

A cell or an organism's behavioural response to an outside stimuli is called taxis. It should not be confused with kinesis, a behavioural reaction causing an organism or cell to move in response to an external stimulus. The movement in kinesis is random or not directionally oriented, whereas the movement in taxis is directionally oriented. The movement could be favourable or unfavourable. When an organism or cell travels toward the source of stimulus, it is said to be in a positive taxis (attraction). When a cell or an organism travels away from the source of stimulation, this is referred to as a negative taxis (repulsion). #Sp j3