- ANegative and positive, respectively.
- BBoth negative.
- CBoth positive.
- DZero.
Explanation:
Histones carry positive charge, because they have an abundance of basic proteins arginine and lysine. The negatively charged DNA is wrapped around positively charged histone resulting in a net positive and negative charge.
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$(1)$ They have dark colour and high rate of reproduction and excrete solid urine.
$(2)$ They do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs.
$(3)$ They feed on dry seeds and do not require drinking water.
$(4)$ They excrete very concentrated urine and do not use water to regulate body temperature.
Which two of the above statements for such animals are true ?