Answer:
Means to increase drag and prevent sinking is the correct answer.
Explanation:
Plankton avoid sinking by increasing their surface area and decreasing their density. Spines slow down sinking by adding surface area without increasing density. Defense against predation would be to sing below. Not the opposite.
Explanation:
The most common and fastest way of measuring ocean depth uses sound. Ships using technology called sonar, which stands for sound navigation and ranging, can map the topography of the ocean floor. The device sends sound waves to the bottom of the ocean and measures how long it takes for an echo to return.
Natural selection is a theory developed by Charles Darwin. It is believed that animal species evolve by nature "selecting" the ones that are fit to live in specific environments. For example, if an animal lacks a trait that is needed for a certain environment, it is likely to die. The animals that have the needed traits are more likely to live and procreate, which will pass on the trait to its offspring. Hope this helped!
The correct option is B.
Harry Harlow was an American psychologist, who through his study proof that children need love and affection to develop normally. He demonstrated this by using rhesus monkey babies, who are taken away from their mothers immediately after birth. In place of their real mother, Harry provided two surrogate mothers instead and allow the monkey to chose any one they prefer. The first surrogate mother was made of wire and monkeys can get food from her while the second surrogate mother was made of soft terry cloth but the monkey can not get any food from her. Harry observed that the monkeys prefer to stay with their terry cloth mother, which provide comfort and security than with the one made of wire. The monkeys only go to the wire mother when they are hungry.
Answer:
The answer is b. the theory must be changed or abandoned.
Explanation:
If a scientist finds a contradictory fact to an already existing theory, then after a scientific validation of the new found fact, the existing theory has to be changed or be replaced with a new one.
The rest of the answer options are silly and incorrect!
