The process by which pollen grains are transferred to the stigma is called: MCQ with Answer and Explanation

Explanation:
Ovaries are the primary female gonads that produce ova (eggs) and secrete sex hormones estrogen and progesterone. The uterus supports embryo development, the fallopian tubes transport eggs, the vagina is the birth canal.

Explanation:
Helicase unwinds the DNA helix at the replication fork by breaking hydrogen bonds between base pairs. DNA polymerase adds nucleotides, ligase seals Okazaki fragments, primase synthesizes RNA primer. This coordinated action ensures accurate semi-conservative replication. Without helicase, the strands would not separate. Energy for unwinding comes from ATP hydrolysis.

Explanation:
RNA contains uracil instead of thymine found in DNA. In DNA, adenine pairs with thymine; in RNA, adenine pairs with uracil. Adenine, guanine, and cytosine are common to both. Uracil is a pyrimidine base, structurally similar to thymine but lacking a methyl group. This distinction is used in genetic material identification and understanding transcription.