29. organisms must also respond to ____________ factors in order to stay healthy & survive.
30. what are two internal factors that organisms respond to?
31. give two examples from the reading of how living things respond to changes in their environment.
32. if light is applied to a human eye, how does it respond?
33. describe homeostasis.
section b
directions: match the statement to the appropriate characteristics of life.
answer bank
a. be unicellular or multicellular e. respond to stimuli
b. contain dna or rna f. be able to adapt & evolve
c. be capable of growth g. have a metabolism
d. be capable of reproduction
34. ________________ “that boy shot up five inches in only one year.”
35. ________________ “our cat had a litter of kittens yesterday.”
36. ________________ “my dog has become much less clumsy now that he is a year old.”
37. ________________ “eat a good breakfast and you will be able to run longer.”
38. ________________ “when that car pulled in the driveway, my cat ran to hide under the
39. ________________ “that owl’s night vision allows it to see the movement of mice on even the darkest night.”
40. ________________ “single - celled organisms live in the pond behind school.”
41. ________________ your body normally maintains a temperature of 98.6 degrees f.
42. ________________ a giraffe uses its long neck to eat from the high branches of a tree.
43. ________________ is another name for \living thing\.

Question

29. organisms must also respond to ____________ factors in order to stay healthy & survive.
30. what are two internal factors that organisms respond to?
31. give two examples from the reading of how living things respond to changes in their environment.
32. if light is applied to a human eye, how does it respond?
33. describe homeostasis.
section b
directions: match the statement to the appropriate characteristics of life.
answer bank
a. be unicellular or multicellular  e. respond to stimuli
b. contain dna or rna  f. be able to adapt & evolve
c. be capable of growth  g. have a metabolism
d. be capable of reproduction
34. ________________ “that boy shot up five inches in only one year.”
35. ________________ “our cat had a litter of kittens yesterday.”
36. ________________ “my dog has become much less clumsy now that he is a year old.”
37. ________________ “eat a good breakfast and you will be able to run longer.”
38. ________________ “when that car pulled in the driveway, my cat ran to hide under the
39. ________________ “that owl’s night vision allows it to see the movement of mice on even the darkest night.”
40. ________________ “single - celled organisms live in the pond behind school.”
41. ________________ your body normally maintains a temperature of 98.6 degrees f.
42. ________________ a giraffe uses its long neck to eat from the high branches of a tree.
43. ________________ is another name for \living thing\.

Accepted Answer

### Question 29
# Brief Explanations:
Organisms need to respond to environmental factors (both internal and external) to maintain health and survive. The blank likely refers to "environmental" (including internal and external, but in the context of the following questions about internal factors, this is about the general factors organisms respond to, with environmental being a broad term covering both internal and external, but more precisely, internal and external factors, but the question is asking for the type of factors, so "environmental" or "stimuli - related" but more accurately, organisms respond to both internal and external factors, but the blank here is likely for "environmental" or "internal and external", but given the next question about internal factors, this is about the factors (stimuli) organisms respond to, so the answer is "environmental" (or "internal and external", but more precisely, the term is "environmental" or "stimuli - related", but in the context of biology, organisms respond to environmental (including internal and external) factors.
# Answer:
environmental (or stimuli - related, but the standard answer is "environmental" or more precisely, "internal and external" but in the context of the question, the answer is "environmental" or "stimuli" - related, but the most appropriate is "environmental" or "internal and external", but the correct term here is "environmental" (as organisms respond to environmental factors which include internal and external).

### Question 30
# Brief Explanations:
Internal factors that organisms respond to are factors within the organism's body. Examples include changes in hormone levels (e.g., insulin levels regulating blood sugar) and changes in cellular conditions (e.g., the concentration of nutrients or waste products within cells). Another example is the body's internal temperature (though temperature can also be regulated, but the response to internal temperature changes, or the level of carbon dioxide in the blood (which triggers changes in breathing rate).
# Answer:
Two internal factors that organisms respond to are: 1. Hormone levels (e.g., insulin levels in the blood, which the body responds to by adjusting glucose uptake by cells). 2. The concentration of carbon dioxide in the blood (which the body responds to by adjusting the breathing rate). (Other examples: changes in internal pH, changes in nutrient levels within cells, etc.)

### Question 31
# Brief Explanations:
Since the reading is not provided, we can give general examples of how living things respond to environmental changes. For example, plants bend towards light (phototropism) - this is a response to the environmental factor of light. Another example is a dog panting when it is hot - a response to the environmental factor of high temperature. Or a plant closing its stomata when water is scarce - a response to the environmental factor of water availability.
# Answer:
Example 1: A sunflower bends towards the sun (response to light, phototropism). Example 2: A human sweats when it is hot (response to high temperature, a way to cool down). (Other examples: A plant wilts when it lacks water (response to water scarcity); A bird migrates to a warmer region in winter (response to temperature change).)

### Question 32
# Brief Explanations:
When light is applied to a human eye, the pupil constricts (becomes smaller) to reduce the amount of light entering the eye, and the iris muscles adjust the pupil size. Also, the retina detects the light, and the eye may blink (a protective response) or the eye's lens may adjust its shape (accommodation) if the light - source is at a certain distance, but the primary immediate response to light is the constriction of the pupil (pupillary reflex) to prevent over - stimulation of the retina.
# Answer:
When light is applied to a human eye, the pupil constricts (gets smaller) to limit the amount of light entering the eye, and the eye may also blink as a protective reflex. The retina detects the light and sends signals to the brain for visual processing. The primary visible response is the constriction of the pupil (pupillary reflex).

### Question 33
# Brief Explanations:
Homeostasis is the ability of an organism or a cell to maintain a stable internal environment despite changes in the external environment. It involves the regulation of various physiological processes such as body temperature, blood sugar levels, blood pH, and water balance. For example, the human body maintains a constant body temperature of around 98.6°F (37°C) through mechanisms like sweating (to cool down) and shivering (to warm up). The body also regulates blood glucose levels through the actions of insulin and glucagon.
# Answer:
Homeostasis is the process by which an organism (or a cell) maintains a stable internal environment, even when the external environment changes. It involves the regulation of various physiological parameters (such as body temperature, blood sugar levels, blood pH, and water balance) within a narrow range to ensure the proper functioning of cells and organs. For example, the human body maintains a constant body temperature (around 37°C) by sweating to cool down or shivering to warm up, and regulates blood glucose levels using hormones like insulin and glucagon.

### Question 34
# Brief Explanations:
The statement "That boy shot up five inches in only one year" describes growth. The characteristic "Be Capable of Growth" (option C) matches this, as growth is an increase in size or mass, and the boy's increase in height is a form of growth.
# Answer:
C. Be Capable of Growth

### Question 35
# Brief Explanations:
The statement "Our cat had a litter of kittens yesterday" describes reproduction, as reproduction is the process of producing offspring. The characteristic "Be capable of Reproduction" (option D) matches this, as the cat has produced kittens (offspring).
# Answer:
D. Be capable of Reproduction

### Question 36
# Brief Explanations:
The statement "My dog has become much less clumsy now that he is a year old" describes growth and development (a form of growth - related development, as the dog is maturing and improving its motor skills with age, which is part of growth and development). The characteristic "Be Capable of Growth" (option C) also encompasses development (as growth includes physical and functional development), so this matches option C.
# Answer:
C. Be Capable of Growth

### Question 37
# Brief Explanations:
The statement "Eat a good breakfast and you will be able to run longer" relates to metabolism, as metabolism is the set of chemical reactions in the body that convert food into energy. Eating a good breakfast provides nutrients that are metabolized to produce energy for running. The characteristic "Have a metabolism" (option G) matches this, as metabolism is about the energy - producing and energy - using processes in the body.
# Answer:
G. Have a metabolism

### Question 38
# Brief Explanations:
The statement "When that car pulled in the driveway, my cat ran to hide under the..." describes the cat responding to a stimulus (the car pulling in the driveway is a stimulus, and the cat's running to hide is a response). The characteristic "Respond to stimuli" (option E) matches this, as responding to stimuli is an organism's ability to react to changes in the environment (the car is an environmental stimulus).
# Answer:
E. Respond to stimuli

### Question 39
# Brief Explanations:
The statement "That owl's night vision allows it to see the movement of mice on even the darkest night" describes an adaptation (the owl's night vision is an adaptation that allows it to survive and reproduce in its environment). The characteristic "Be able to adapt & evolve" (option F) matches this, as the owl's night vision is an adaptation that has evolved over time to help it in its ecological niche.
# Answer:
F. Be able to adapt & evolve

### Question 40
# Brief Explanations:
The statement "Single - celled organisms live in the pond behind school" describes the cellular organization of organisms (being unicellular). The characteristic "Be Unicellular or Multicellular" (option A) matches this, as it is stating that the organisms in the pond are single - celled (unicellular), which is part of the characteristic of being unicellular or multicellular.
# Answer:
A. Be Unicellular or Multicellular

### Question 41
# Brief Explanations:
The statement "Your body normally maintains a temperature of 98.6 degrees F" describes homeostasis (the body's ability to maintain a stable internal environment, in this case, body temperature). However, looking at the answer bank, there is no direct homeostasis option, but the process of maintaining temperature is related to metabolism (G) or adaptation (F), but actually, the maintenance of body temperature is part of homeostasis, but since the answer bank does not have a homeostasis option, we re - evaluate. Wait, the body's temperature regulation is also related to metabolism (as metabolism produces heat), but more accurately, the maintenance of a stable temperature is part of homeostasis, but since the answer bank has options like "Have a metabolism" (G) or "Respond to stimuli" (E), but no homeostasis option. Wait, maybe a mistake, but looking at the options, the maintenance of temperature is related to the body's metabolism (producing and regulating heat) or adaptation, but actually, the correct match here is not directly in the answer bank, but maybe a mis - question. Wait, no, the body's temperature maintenance is part of homeostasis, but since the answer bank does not have that, maybe the question is about the process, but the answer bank options: "Have a metabolism" (G) - metabolism is involved in heat production, but the maintenance of temperature is homeostasis. However, maybe the question is mis - phrased, but looking at the options, the closest is "Have a metabolism" (G) or "Respond to stimuli" (E), but actually, the correct answer here is not in the options, but maybe the question is about the characteristic related to maintaining temperature, which is part of homeostasis, but since the answer bank does not have it, maybe there is a mistake. Wait, no, the body's temperature regulation is a response to internal and external stimuli (E) or part of metabolism (G). But the correct answer here is actually related to homeostasis, but since it's not in the answer bank, maybe the intended answer is "Have a metabolism" (G) as metabolism is involved in energy production and heat regulation.
# Answer:
G. Have a metabolism (Note: This is a bit of a stretch, as temperature regulation is homeostasis, but since homeostasis is not an option, metabolism is related as metabolism produces heat and the body regulates heat production and loss as part of metabolism - related processes.)

### Question 42
# Brief Explanations:
The statement "A giraffe uses its long neck to eat from the high branches of a tree" describes an adaptation (the giraffe's long neck is an adaptation that allows it to access food, so it can adapt and evolve (F) or respond to stimuli (E). The long neck is an adaptation, so it matches "Be able to adapt & evolve" (F).
# Answer:
F. Be able to adapt & evolve

### Question 43
# Brief Explanations:
The statement "______ is another name for 'living thing'" - the term for a living thing is an "organism". But looking at the answer bank, there is no "organism" option. Wait, maybe a mis - question, but looking at the answer bank options, none of them mean "living thing" directly. But maybe a mistake, but if we assume that the answer is related to the options, maybe "Be Unicellular or Multicellular" (A) as all living things are either unicellular or multicellular, but that's not a name. Wait, this is likely a mis - printed question, but if we have to choose from the answer bank, there is no correct option, but maybe the intended answer is "Be Unicellular or Multicellular" (A) or another option, but this is an error. However, if we assume that the question is wrong, but the answer bank has no correct option, but maybe the intended answer is "Be Unicellular or Multicellular" (A) as all living things are either unicellular or multicellular, but that's not a name. So this is a problematic question.

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