Answer:
C. Both A and B describe errors in the statement.
Explanation:
In fossilization i.e formation of fossils, two terms are used as follows: permineralization and petrification.
- Permineralization is a process whereby the pore spaces of an organism's remains are filled with mineral matter that precipitates from lake and ocean solutions.
- On the contrary, petrifaction or petrification is the process whereby a once-living tissue (matter) are REPLACED by minerals, hence, preserving the organism's structure by turning it into a stone (petros).
According to this question, the student mixed up their definitions by giving the definition of permineralization instead, however, options A and B have described the errors associated with the statement.
Answer: A, B, C
Explanation: I got the answer from USA test prep
Surface tension allows for water adhesion and cohesion
Answer:
Carotenes are less polar and would elute first.
Explanation:
Carotenes are organic compounds like chlorophyll, they are responsible for the orange color in carrot. So, while chlorophyll is green, carotene is orange in color.
In terms of structure, carotene is a hydrocarbon (made up of carbon and hydrogen chains), making it non-polar. On the other hand, chlorophyll (made up of carbon, hydrogen, oxygen, nitrogen, magnesium) is more polar.
Chromatography is a separation technique used to separate two or more mixtures. The working principle is based on how fast each solute travels. So in column chromatography, the components of the mixture travel through a column (e.g a burette) at different speed. The less polar component travels faster.
So far a mixture of carotene and chlorophyll, the less polar carotene will travel faster than the more polar chlorophyll. Therefore, carotene will elute first.
Is this a true or false question? If so it is true.
