Speculate as to why the success rate of treatment is much higher for testicular and prostate cancers than for ovarian cancer
What will be an ideal response?
Testicular cancer affects men in their young-adult to middle-aged years. If testicular cancer is detected early, the chance of survival is nearly 100%, but self-examination and detection are essential. For prostate cancer, like testicular cancer, the key to survival is early detection. If the cancer is still contained within the prostate when detected, the chances for survival for 5 years are 95%. Unfortunately, there is no self-exam or routine testing that is used for ovarian cancer. This makes early detection difficult.
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A researcher examines a piece of oak tree bark under a microscope. He notices many small holes or spaces within his bark sample. What are these areas?
A. stomata B. suberins C. pericycles D. lenticels
During starvation, humans and other animals deplete glycogen and fat reserves first, followed by protein
A. true B. false
Forelimbs form at the junction of the neck and thoracic vertebrae, the position of which is controlled by HoxC-6 genes. Several kinds of vertebrates from different Classes are legless, including legless lizards, and amphibians known as caecilians. All descended from legged forms. On the basis of recent research in genetics what would you predict about the functioning of their HoxC-6 genes?
A. The site of expression of their HoxC-6 genes may have moved anteriorly until the level of expression has eliminated the neck region. B. The site of expression of their HoxC-6 genes would be the same as that of legged vertebrates but is simply turned off early in development. C. Their HoxC-6 gene has mutated and serves a different function than in legged vertebrates. D. The effect of the HoxC-6 gene is masked by another gene that is dominant to it. E. None of the other choices provided offer an adequate explanation and other reasons must be sought.
A 9:3:3:1 phenotypic ratio is expected from a dihybrid cross between a double heterozygote and a fully recessive organism
Indicate whether the statement is true or false