Answer:
<em><u>A</u></em><em><u>:</u></em><em><u> </u></em><em><u>crust</u></em>
<em><u>B</u></em><em><u>:</u></em><em><u> </u></em><em><u>mantle</u></em><em><u> </u></em>
<em><u>C</u></em><em><u>:</u></em><em><u>core</u></em><em><u> </u></em><em><u>explanation</u></em><em><u> </u></em><em><u> </u></em><em><u>may</u></em><em><u> </u></em><em><u>it</u></em><em><u> </u></em><em><u>help</u></em><em><u> </u></em><em><u>u</u></em><em><u> </u></em><em><u>buddy</u></em><em><u> </u></em>
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.
Answer and Explanation:
Organism
↓
Population
↓
Biological community
↓
Ecosystem
Ecosystem is a natural self-sustaining ecological unit in which the different types of habitats and their flora and fauna interact and influence one another. e.g., forest, grassland,lake
Biological community includes all the species-flora and fauna- that exist and interact in a habitat. For instance, the community in a montane forest includes all the animal species of mammals, reptiles, birds
Population is the total number of individuals of a particular species found in a habitat at a particular time.
Organism is any living thing in an ecosystem that has an organized structure, can respond to stimuli, reproduce, grow and develop.
Answer:
(c) the haploid sperm from pollen enters the female gametophyte and fuses with haploid egg
Explanation:
At fertilization, one of the sperm cells units it's haploid nucleus with the haploid nucleus of an egg cell.
After fertilization the diploid egg will give rise to an embryo, hence a new off spring is formed
Answer: when scientists just found out that cells made every living thing, they wanted to concentrate on the many types and variation of a cell. They did this by isolating the cell in a petri dish, and it is still used today.
