Answer: C. Black snakes will not prey on cane toads in areas where cane toads have been present for 40–60 years.
Explanation:
Cane toad secret a toxin called bufotoxin which is a defense mechanism against predators. These defense mechanism is capable of killing black snakes if they eat cane toads. Within a period of 40 to 60 years, the black snakes in these area will be aware of the presence of a toxin capable of killing them in cane toads and will not prey on them. This phenomenon is termed learned behavioral adaptation.
Colon cancer-causing ulcers and polyps can now be visually diagnosed. A collection of abnormal cells is known as a polyp carcinogen.
<h3>Explain about the
polyp carcinogen?</h3>
If given the chance to develop over time, these polyps could develop into cancer. The term adenomas refers to the majority of these colon polyps. The size and location of the serrated polyps in the colon will determine whether they develop into cancer. Generally speaking, neoplastic polyps have the highest risk of malignancy among all polyp sizes.
A tissue growth that protrudes from the colon or rectum is referred to as a colorectal polyp. Although benign (i.e., not cancerous) and non-proliferating, some forms of polyps have the potential to turn malignant over time. The term "adenomatous polyps" refers to one of these varieties. We refer to these as pre-cancerous polyps.
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24.) C - a change in DNA coding can lead to a change in the protein that is produced, which changes structure, and therefore, function.
28.) C - recombinant DNA is artificial, and the other examples can occur naturally
29.) B - if DNA enters and successfully is produced within a plant cell, but is not originally from the plant cell, then the cell has been transformed.
Sensory neurons receive impulses and carry them from the sense organs to the spinal cord or brain. Interneurons connect sensory and motor neurons and interpret the impulse. Motor neurons carry impulses from the brain and spinal cord to muscles or glands.
