Answer:
Explanation: Most female mammals have an estrous cycle, yet only ten primate species, four bats species, the elephant shrew, and one known species of spiny mouse have a menstrual cycle. As these groups are not closely related, it is likely that four distinct evolutionary events have caused menstruation to arise.
Answer:
Sleights means the use of dexterity or cunning, especially so as to deceive.
Explanation:
This is what this word means but I can't tell you how the context lead me to this because I don't have the passage it came from.
Answer: He has symptoms of an illness that weakened his heartbeat
Explanation:
Rock and minerals are both considered to be natural substances and this is what they have in common.