एक आयताकार खेत की लम्बाई और चौड़ाई में 3:2 का अनुपात है। खेत के चारों ओर मेड़ बनवाने का खर्च ₹ 1.50 प्रतिमीटर की दर से बताइए जब कि खेत का क्षेत्रफल 1.5 हेक्टेयर है।

Which best explains why viruses do not have special structures or enzymes that allow them to make their own food? viruses can use energy in living cells that they infect. viruses can replicate inside a host that they infect. viruses can cause contagious illnesses in host cells. viruses integrate their rna or dna into infected cells.

The green colored pigment in chloroplasts is? a. nitrogen b. chlorophyll c. chlorophorm d. chlorofloromethane

Which would be the most useful source of evidence to support mcneill's contention?