I think it is rising sea level
Haploid means half, and diploid means double of the half, and so its diploid number will be 20⋅2=40 if its haploid number is 20 .
The sign of good health in an animal is bright eyes.
Explanation:
The signs that usually is seen in a healthy animal, is its ability to stand straight and have a keen observation. The Animal will have bright alert eyes.
A healthy animal has quick movements. It gets up quickly if its sitting down. The respiration of the animal will be slow and regular.
The saliva will not be dripping from the animal's mouth. It will have a smooth and shiny coat and its nose will not have any discharge but remain dry.
Any sign of rapid breathing or dull inert eyes, etc means that the animal is not healthy and is sick. A healthy animal acts calmly and does not exhibit any anxious behaviour.
The correct example about the relationship between the insect hormones ecdysteroid and PTTH is interaction of the endocrine and nervous system. Hence, Option A is correct.
ENDOCRINE SYSTEM:
It is a complex system which is under hormonal control. Hormones are released by the glands and it cordinates body functions from metabolism to growth and development.
NERVOUS SYSTEM:
It is a complex system consisting of organised group of cells called neurons that carry messages from brain and spinal cord to other various body parts.
As PTTH (prothoracicotropic hormone) stimulates prothoracic gland of an insect that triggers the release of ecdysone hormone for the stimulation there should be an neuroendocrine mechanism. Thus, Option A is correct.
Learn more about hormonal interations here:
brainly.com/question/1218436
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