Answer:
A. through proteins embedded in the membrane that "recognize" specific substrates and allow their passage.
Explanation:
Some of the membrane proteins serve as transport proteins. These transport proteins can serve as channels, carriers or pumps and allow facilitated diffusion or active transport of the substances across the membrane. ion channels are transport proteins that allow specific ions to move across the membrane since the charged ions cannot cross the non-polar core of the membranes. Most of the ions channels are specific and allow only particular ions to move through them. For example, Na+ ion channels will allow only Na+ ions to move across it while the chloride ions would not able to move through it.
If your observations had not been restricted to the area of the root tip that is actively dividing, how would your results have been different?Cells are in interphase 90% of the time, and, since most of the creation of plant cells occurs in the root tips, you would witness mostly interphase. 2.Based on the data in Table 3.1, what can you infer about the relative length of time an onion root tip cell spends in each stage of cell division?Most of a cells life cycle is spent in interphase. Metaphase is the longest stage of mitosis, and anaphase is the shortest.1.List three major differences between the events of mitosis and meiosis.Meiosis has four nuclear divisions, whereas, mitosis only has one; meiosis creates four haploid cells, whereas mitosis creates two diploid cells; and meiosis is the only one taking part in crossing over.2.Compare mitosis and meiosis with respect to each of the following in Table 3.2:Table 3.2Mitosis MeiosisChromosome Number of Parent Cells2n2nNumber of DNA Replications11Number of Divisions12Number of Daughter Cells Produced24Chromosome Number of Daughter CellsDiploid (2n)Haploid (n)Purpose/FunctionRepair and GrowthGamete and Spore
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Prophase 1 of meiosis <span>relative to the number of chromosomes of a given species, accounts for a significant amount of genetic variation in gametes.</span>
Answer:
symbiosis.
Explanation:
The term that you are referring to is symbiosis. (a symbiotic relationship)
Symbiosis is a proximate and often long-term interaction between two or more different biological species.
