The correct answer is A.
It starts with a hypothesis, which is basically and educated guess.
Then it goes to a theory, which is proven with a bunch of data.
Then it goes to scientific law, which is when the theory works with centuries of data. Not even scientific laws are guaranteed to be true though.
Answer:
1. They must be removed before sister chromatids or homologous chromosomes can separate
Explanation:
During the S-phase of the cell cycle, not only does DNA have to be replicated, but also newly synthesized DNA molecules have to be connected with each other. This replicated DNA (sister chromatids) remain physically connected with each other from S phase until metaphase. This physical connection is called Sister chromatids cohesion.
Sister chromatid cohesion depends on COHESIN, a tripartite protein complex that forms a ring structure to hold sister chromatids together during mitosis and meiosis. Cohesin regulates the separation of sister chromatids during cell division, either mitosis or meiosis. This sister chromatid cohesion is essential for the biorientation of chromosomes on the mitotic or meiotic metaphase spindle, and is thus an essential prerequisite for chromosome segregation. Without the cohesion, sister chromatids would not be segregated symmetrically between the forming daughter cells, resulting in aneuploidy.
Cohesion is established during S-phase of DNA replication, and the cohesins hold the sister chromatid together after DNA replication until anaphase when the removal of cohesin leads to separation of sister chromatids (meiosis II and mitosis) and homologous chromosomes (meiosis I).
The organelle properly matched to it's function is
-(C) lysosome: digestion
Explanation:
<u>Lysosomes</u> : It hold enzymes that were created by the cell. The purpose of the lysosome is to digest things. They might be used to digest food or break down the cell when it dies
<u>Endoplasmic reticulum</u> : to produce proteins for the rest of the cell to function.
<u>Chloroplast</u> : They are responsible to carry out photosynthesis
Answer:
D.) tRNA
Explanation:
tRNA-(Transfer RNA) molecules carry amino acids to the ribosomes during protein synthesis.
A Cell's Ribosomes-(Basically the structures of when synthesis takes place)
<em>Hoodmemes~</em>
