The absolute threshold is the:
a. decreasing sensitivity to a stimulus over time.
b. intensity of a stimulus that can be detected in the presence of noise.
c. minimal intensity needed to just barely detect a stimulus.
d. minimal change in a stimulus that can just barely be detected.

1. true.2. true.3. true.4. false.5. true.the concept of darwin's theory of evolution involves the idea that there are limited resources in a given living environment and that the organisms which live within have variations in their genetic make up due to random mating. the ones with beneficial genetic variations can express certain traits which give them an upper hand in surviving and reproducing in the said environment compared to ones who may have a more disadvantageous variation in traits. over time, the organisms with an upper hand will survive and reproduce more frequently and pass on their beneficial genes while the others die. the result is evolution, where we observe (usually, but not always) eventually, phenotypic distinct changes.

This is what i did 45-5=4040÷4=10so there are 10 white marbles but am not sure is just a question that am not sure