How can new evidence lead to change in scientific knowledge

Since scientists are constantly learning new things new evidence could prove our theories wrong and could help us form new hypothesis'. That is how what we learn today is always affecting what we learned yesterday.

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.

Centriole.centrioles are present in animal cells but are usually absent in plant cells.