Because the vasculary bundles are sectioned and sieve can't pass through to feed the organs of the plant.
Answer:
3/8 tall, green, round
3/8 dwarf, green, round
Explanation:
<u>The progeny which are in highest ratio represent parental plants.</u>
Here in the given question, 3 out of 8 progeny are tall, green, round and 3 out of 8 progeny are dwarf, green, round which are the highest in number so they represent parental plants. The reason behind this is that during crossing over only two non-sister chromatids undergo crossing over while two other parental chromosomes remain intact. Out of the 4 chromosome types, 2 remain the same which will result in the same type of genotype of off-springs as of parents. So even if there is 100% chance of crossing over between non sister chromatids still only 50% will be recombinants rest of the 50% will represent parental type.
Another case may be when two genes are very near to each other then it is quite possible that the genes may not undergo crossing over at all in that case there will be no recombinants at all.
So, it simply means that parentals > recombinants or the progeny which are highest in number represent parentals.
In case of unlinked genes, parentals = recombinants. But, <u>recombinants can never be greater than parentals.</u>
Cell membranes are made of phospholipids to keep the cell's water (cytoplasm) in and everything else out. so your answer would be D <span />
Answer:
Quarks pair with other quarks to form protons and neutrons.
Explanation:
Every atom contains a nucleus and within the nucleus, protons and neutrons are present. A quark is the fundamental particle of a matter. Quarks are joined together to form hadrons. Protons and neutrons in the nucleus of an atom are hadrons. Thus, quarks are the smallest particle of a matter as believed by most of the physicists.