Answer:
Have hard parts
Were generally large
Lived in a narrow range of geographical area
Are extinct
Explanation:
Dissection is one of the procedures through which scientists can find out about the internal parts of life science specimens.
Dissection in its literal terms is the cutting down of an object. The process involves cutting the parts and organs of an organism to study its anatomical structures. The process should be performed carefully so that the anatomy is not ruined and results are not misinterpreted.
Specimens are the samples related to living organisms used to visualize and study about them. These specimens can be deceased living organisms that are carefully preserved using chemicals. Other structures of the living organisms like their teeth, skin, exoskeleton, horns, etc. can also be considered a specimen.
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Answer:the part of the brain that has most likely been damaged in this experiment is the suprachiasmatic nucleus (SCN) found in the hypothalamus of the brain.
Explanation:
circadian rhythms are behavioural changes that respond to light and darkness in an organisms environment. The sleep-inducing wake cycle is a good example of a circadian rhythm. In the experiment, the disruption of the mouse SCN led to development of imbalances in the circadian rhythm of sleep and wake cycle leading to falling asleep and waking up at random times of the day and night. I hope this helps. Thanks
Answer: B) are excited by light that falls in the center of their receptive field.
Explanation:
There are two types of bipolar cells present in the retina which are differentiated on the way the centres of their receptive fields respond to light. The names of bipolar cells are ON-centre and OFF-centre.
If a light fall at the centre of the receptive field of a bipolar cell, it will experience an exciting effect on that cell, resulting in it being depolarized, it is an ON-center cell.
Hence, the correct option is B.
