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Answer:
X: Producers undergo photosynthesis
Y: Decomposers return carbon to the soil and release
waste.
For examination of urine in case of infants, a collecting bag is attached to the child's skin. After attaching the urine collecting bag to the child's skin, a diaper is put on the baby, over the collecting bag. The bag is removed once the child has urinated.
Answer: THE DIAPER IS WORN OVER THE COLLECTING BAG.
Answer:
The correct answer is d. eukaryotes almost always produce polycistronic mRNA
Explanation:
mRNA can be polycistronic or monocistronic. A monocistronic mRNA contains the information of one gene only so a monocistronic mRNA code only one protein at a time but a polycistronic mRNA can code for multiple proteins at a time.
In eukaryotes, one transcriptional unit carries the information of only one protein so eukaryotes produce monocistronic mRNA but some eukaryotes are capable of having polycistronic mRNA.
In prokaryotes, many genes are transcribed as a unit to produce multiple proteins so prokaryotes produce polycistronic mRNA. Therefore the statement which is not true is d. eukaryotes almost always produce polycistronic mRNA.
