Answer the following statement(s) true (T) or false (F)

Question

1. True or False: If Ca+2 levels in the blood are too low, hormones from the parathyroid gland can induce bones to dissolve and release calcium. 
2.  Animals with closed circulatory systems are more successful than animals with open circulatory systems.  

Clarify Question
What is the key concept addressed by the question?
What type of thinking is required?
 
Gather Content
What do you already know evolutionary success? What other information is related to the question?
 
Choose Answer
Given what you now know, what information is most likely to produce the correct answer?
 
Reflect on Process
Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?

3. Since men produce millions of sperm, but women produce only one oocyte per cycle, in the vast majority of cases infertility is due to a problem with the woman. 
4.  The placenta protects the developing fetus from harmful substances like alcohol or drugs.  
5. True or False: Haplodiploidy is necessary for eusociality. 

Answer 1

1. TRUE
2. TRUE

Clarify Question
What is the key concept addressed by the question?
        · This question is asking about the relationship between closed circulatory systems the success of a species.
What type of thinking is required?
        · Apply level:
            o You are being asked to take what you already know and use, or apply, it to the idea of success as a species.
 
Gather Content
What do you already know evolutionary success? What other information is related to the question?
        · The evolutionary success of a species is related to its current existence, the duration of its history of a species, and the abundance of the species over time.
        · Open circulatory systems have a beating heart and some blood vessels, but the blood eventually enters an open space in which it bathes the tissue directly.
        · In a closed circulatory system, the red blood cells do not leave the blood vessels under normal circumstances.
        · In a closed circulatory system the blood is moved directly to individual tissues, so the efficiency of oxygen delivery is increased.
        · Since the vascularization in a closed circulatory system is more extensive than that which occurs in an open circulatory system, a closed circulatory system can be considered more complex.
 
Choose Answer
Given what you now know, what information is most likely to produce the correct answer?
        · While the increased efficiency of a closed circulatory system does make larger body size possible, greater body size does not indicate success.
        · The most numerous animals on our planet today, the insects, have open circulatory systems.
 
Reflect on Process
Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
        · Apply level:
            o Answering this question correctly depended on your ability to use the idea of biological success in a new situation. If you got an incorrect answer, did you remember that success is not necessarily related to complexity, or that animals with open circulatory systems are both abundant and diverse on our planet? Did you have trouble extending the idea of evolutionary success to determine the correct answer?

3. FALSE - In human couples with infertility, about 40% of the cases can be attributed to the man, about 45% to the woman, and the rest are unexplained. To be fertile, a man needs to produce a massive number of morphologically and genetically normal sperm.

4. FALSE
5. FALSE - Not necessarily. Termites and naked mole rats have complex societies, but do not have haplodiploidy. However, haplodiploidy does seem to favor the evolution of eusociality, because it increases the relatedness of female siblings (75%) compared to mothers and progeny (50%).