Thinker Stinker #3 An \"energetie\" student brought an organism to class for res

Question

Thinker Stinker #3 An "energetie" student brought an organism to class for research purposes. Extensi studies revealed the following about the organism: The red blood cells, which contain a nucleus, were always found circulating in blood vessels. The organism contained a four chambered heart and a pair of lungs. The organism took food into one opening and waste products were passed out of an anus. ve did not 25. The organism's digestive system functioned to break large food molecules down into smaller molecules so they could be used for: A. photolysis B. CO2 fixation C. cell respiration D. None of the choices are correct 26. The organism we studied also contained a thyroid gland. What is the relationship, if any, between the above answer to question number 25, and the thyroid gland? A. there is no relationship B. the hormone produced by the thyroid gland slows the reaction C. the hormone produced by the thyroid gland speeds up the reaction 27. What type of circulatory system did the organism possess? A. incomplete circulatory system B. open circulatory system C. closed circulatory system D. a circulatory system like that of a crayfish Through which type of blood vessel would the exchange of materials with the cells occur? A. arteries 28. B. veins C. capillaries all of the above D.

Explanation / Answer

25. C is correct. Complex nutrient molecule are converted into simole sugar which can be used during cellular respiration to produce energy for other biological processes.

26. C.

Thyroid gland produces thyroxine hormone which results in increased metabolic action.

27. C

The blood is pumped with the aid of heart is only found in closed circulatory system where the blood flows through vessels and reach every part of body and again brought back to the heart.

28. D

all 3 of these are different types of blood vessels associated with heart pumping system. Arteries carry oxygenated blood and vein carries deoxygenated blood. And capillaries are present at the junction of artery and vein.

29. C.

It has a comolete digestive system which means that a digestive system includes a mouth to take food and a particular opening as anus to excrete out.

30. C

It is not an amphibia as amphibia has RBC with nucleus. And mammals (which includes human) has RBC devoid of nucleus.

31. C

Right atrium receives deoxygenated blood (which is full of Carbon dioxide, generated from cellular respiration) from all over the body.

32. B

Veins carry dexygenated blood towards the heart from different parts of our body. Heart purifies that blood by sending it to the lung and artery carries oxygenated blood (from left atrium) from the heart towards the body parts.

33. D

Cellular respiration involves breakdown of simole carbohydrate molecule (glucose) and produce energy. So, it takes up the glucose from blood and blood glucose level decreases.

34. C

Insuling lowers the blood glucose level by taking is up and storing it as glycogen. And glucagon breaks that glycogen to form glucose and increase blood sugar level.

35. C

Alveoli is the unit of lung where gaseous exchanges take place.

36. C

Capillaries are very important for exchange in cell or tissue level. It allows oxygen , nutrients, hormones to diffuse into minute cells.

37. A

Oxygen and carbon dioxide are transported via haemoglobin present in the RBC of animal blood. Haemoglobin binds with oxygen to form oxyhaemoglobin and it binds with carbon dioxide to form carboxyhaemoglobin. And it carries those gases.

38. A

A scientific name consists of two part. One is genus and other part is species.

39. B

Class is further subdivided into orders. So, they have to belong from similar class to stay in same order. However, orders are further divided into family and family is subdivided into genus. So, two organism from same order may or may not be from same family or genus.

40. A. It is the correct sequence.

Domain is the largest division. For other division to be memorized easily, I'm providing you mnemonic.

King Philip comes out for great soup.

King - Kingdom

Philip- Phylum

Comes- Class

Out- Order

For- Family

Great- Genus

Soup- species.

Hope it helps.

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