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Solved Exam 3 Worksheet
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Iowa State University
22. Photorespiration
a. helps plants by capturing O2
c. hurts plants by capturing CO2
Leader:
Course:
Instructor:
Date:
Umair
Biology 212 (3)
Mayfield
04/28/11
b. helps plants by capturing CO2
d. hurts plants by capturing O2
27. All of the following are characteristics of monocots except
a. parallel venation
b. tap root system
c. vascular bundles complexly arranged
multiples of 3
28. Root systems serve to
a. provide anchorage
c. absorb water and minerals
d. floral parts in
b. can be used for food storage
d. all of the above
33. A horizontal stem that grows underground is called a
a. rhizome
b. tuber c. bulb
d. all of the above
34. All of the following are parts of a leaf except
a. blade b. petiole
c. sepal d. all of the above are parts of a leaf
35. A compound leaf
a. has more than one function
b. consists of divided leaflets
c. is in an atypical spot on the plant
d. consists of leaflets
36. Root hairs are an extension of
a. dermal tissue cells
b. vascular tissue cells
c. ground tissue cells
d. root hairs are not extensions of a cell; they are cells
37. Tracheids and vessel elements are both cells found in
a. xylem tissue b. phloem tissue c. ground tissue d. protoplast tissue
39. Sieve-tube member cells have no_______ and therefore need companion cells
a. mitochondria b. chloroplasts c. Endoplasmic reticulum
d. nucleus
41. In ________ the vascular bundles are arranged in a ring and the _________ is on the inside of the ring.
a. dicots, pith
b. dicots, cortex c. monocots, pith
d. monocots, cortex
42. Collenchyma are
a. typical plant cells
b. specialized for support c. are found in growing tissues
45. Meristematic tissue
a. is at the tips of shoots and roots
c. none of the above
d. all of the above
b. . has cells that are undifferentiated
d. all of the above
48. Which of the following are root zones dedicated to growth
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a. zone of elongation
above
b. zone of maturation
50. The casparian strip
a. produces new vascular tissue
c. produces epidermal tissue
c. zone of cell division
d. all of the
b. keeps unwanted molecules out of the vascular tissue
d. forms a waxy coating on the leaves to keep water in
51. Mycorrhizae have a symbiotic relationship with the ______ of plants to help _________
a. roots, water and mineral absorbtion
b. leaves, capture energy from sunlight
b. phloem tissue, transport sugars
c. root meristems, grow stronger roots
52. Vascular bundles in the stems of dicots form a ring around the perimeter with the xylem towards the
a. pith
b. cortex
c. roots d. leaves
53. Every year of growth in a plant documented by rings of _____ tissue with the oldest ring on the ____.
a. phloem, outside
b. phloem, inside c. xylem, outside d. xylem, inside
55. The cells in the leaf that contain chlorophyll are
a. mesophyll cells
b. epidermal cells
56. Phloem tissue transports
a. sugar up
b. sugar down
c. guard cells
c. sugar up and down
57. Water tension in plant cells gives them a
a. flaccid appearance
b. turgid appearance
above
d. all of the above
d. water and mineral up and down
c. evolutionary advantage d. none of the
58. ___________ flow allows water and minerals flow directly into the xylem vessels
a. symplastic and apoplastic
b. a symplastic c. apoplastic
d. casparian
59. Transpiration is caused by
a. pumping of water and minerals into roots
c. mycorrhizae taking water from the plant
b. water evaporating out of stomata
d. guttation
60. Phloem transport is driven by
a. root pressure b. osmotic pressure flow c. all of the above
61. Megaspores
a. make pollen grains
b. make microspores
d. none of the above
c. are produced by the ovule
d. are diploid cells
1. Organs are characterized by
a. specialized cells b. at least 2 types of cells and functions
c. being the basic unit of living organisms d. cells with a common functions
2. Tissues that serves to form glands and gametes as well as covering and lining structures is
a. muscular tissue
b. nervous tissue
c. connective tissue d. epithelial tissue
3. The structural organization of animals include
a. tissues
b. organs
c. systems
d. all of the above
4. Heterotrophs
a. include all animals
b. make their own food
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c. must ingest other organisms for food
d. a and c
5. Metabolic rate measures ___________ in ____________.
a. energy used by an animal, kilocalories b. energy ingested by an animal, kilocalories
c. energy used by an animal, calories
d. energy ingested by an animal, calories
7. Homeostasis is used to
a. maintain the body’s temperature
c. maintain composition of body fluids
8. Food is used for
a. fuel
b. essential nutrients
above
b. maintain optimal volume in cells, organ, etc.
d. all of the above
c. carbon skeletons for molecules
d. all of the
11. Which of the following are not essential amino acids?
a. valine
b. histidine c. alanine
d. leucine
14. Extracellular digestion is
a. carried out in the animals tissues
c. involves phagocytosis
b. carried out outside of the animals tissues
d. is carried out by sponges
16. Arteries
a. carry blood back to the heart
b. carry blood away from the heart
c. allow gas, nutrient, or waste exchange
d. have valves
18. Coronary circulation pumps blood to
a. the heart
b. the brain c. the lungs
19. Which contracts first
a. the left side of the heart
atria
d. all of the above
b. the right side of the heart
c. the ventricles
20. The heart maintains it’s own rhythm starting at the
a. sinoatrial node
b. atrioventricular node
c. semilunar valve
valve
d. the
d. atrioventricular
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Short Questions
1. What is homeostasis?
Homeostasis is the maintenance of a constant internal environment
2. What is the difference between an Artery and a Vein
Veins have Semilunar Valves, thinner muscular walls and carry blood towards the heart
3. What is primarily digested in the stomach and how?
Proteins----------Walls made up of strong muscles which mix and churn the food------Glands
secrete gastric juices containing water,enzymes and acid----HCL softens food and kills germs---HCL converts pepsinogen in to the active form pepsin---depolymerization reaction involving
hydrolysis----------Ultimately food is churned into thick soupy liquid called chume---------paristalsis then moves the chyme into the deudonem through the pyloric spinchter
4. What is the importance of signal amplification
5. How does water get from the roots to the top of a tree?
a. Where is the water potential most negative in a plant?
6. Discuss the structure of a leaf. How do stomata open and close?
a. What is the mechanism?
b. What are guard cells?
7. Where do plants get nitrogen?
b. Where does nitrogen in the soil come from?
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1060 Hixson-Lied Student Success Center  294-6624  www.si.iastate.edu
From soil-------------Nitrogen fixing bacteria converts nitrogen in the atmosphere into Ammonia---------Ammonia is converted into nitrites (NO2) and eventually nitrates (N03) by the
Nitrification bacteria---------------Plants can absorb ammonia as well as Nitrates------------denitrifying bacteria converts nitrates back in to N2-----------when plants die ammonia is released
by the decomposers
Essay Question
Q1. Explain the cardiac cycle and how it helps in gaseous exchange?
Supplemental Instruction
1060 Hixson-Lied Student Success Center  294-6624  www.si.iastate.edu