Microevolution - Allele frequency changes in a certain population over an amount of generations, it can also be simply described as "an evolutionary change in populations".
Answer: crossing over allows for genetic variation
Explanation:
crossing over is the exchange of genes between two chromosomes which ends up resulting in non-identical chromatids that comprise the genetic material of gametes (sperm and eggs).
Basically crossing over makes the chromatids that are held together by a centromere, no longer identical to eachother which creates genetic variation.
Answer:
Excessive nutrients from fertilizer run off.
Explanation:
Scientists have suspected that phytoplankton blooms might be connected to agricultural run-off. They got some evidence from a recent study by comparing the timing of irrigation along the west coast of Mexico and phytoplankton blooms in Mexico’s Sea of Cortez. During the comparison, they had found a close correlation. Phytoplankton blooms occurred in the Sea of Cortez shortly after the irrigation. This happened because of carried fertilizers after irrigation and other agricultural run-offs into the sea.
The bloom detected in the Gulf of Mexico on December 13 might be similarly linked to agricultural run-off.
Answer:
please give me brainlist and follow
Explanation:
An atom that gains or loses an electron becomes an ion. If it gains a negative electron, it becomes a negative ion. If it loses an electron it becomes a positive ion (see page 10 for more on ions).
The structures of prokaryotic and eukaryotic cells affects their function as prokaryotic cell has simpler structure that enables it to perform all the basic life processes but complex functions like multicellularity cannot be achieved by prokaryotes. Eukaryotic cells have complex structures and hence can perform several functions unlike the prokaryotes.
Prokaryotic cell is the primitive type of cell that do not posses a true nucleus. They also do not contain any cell organelles. The ribosome type present in prokaryotes is 70S.
Eukaryotic cell is the advanced cell that possesses a true nucleus and all the cell organelles like mitochondria, chloroplast, golgi body, etc. Eukaryotic cells can even form multicellular structures and perform sexual reproduction, unlike prokaryotic cell.
To know more about prokaryotic cell, here
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