Because sexual reproduction is faster than asexual reproduction. The water flea would have to inseminate itself somehow with asexual, but sexual reproduction is faster in terms of the male can inseminate many female fleas at once.
Answer: Option (C)
Explanation: The rocks at the continental crust are present since a long time, and the oldest rocks so far encountered from the continental crust is approximately 4.4 billion years old.
This has been determined by the Uranium-Lead dating method (Ur₂₃₈-Pb₂₀₆).
Oceanic rocks are estimated to be of very recent age i.e about only 180 million years old.
For Ms. Cantu, the GRB7 gene is not expressed in malignant breast tissue while the ESR1 gene is upregulated in such tissue.
Upregulated genes are shown by the colour red.
Down-regulated genes are shown by the colour green.
Non-differentially expressed genes are indicated by the colour yellow.
Absence of expression is shown by the colour black.
Hence from the table and colours ESR1 The GRB7 gene is not expressed, and the gene is upregulated.
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