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41. Water activity refers to _______________________ and is very important in the field of ______________ _______________.
42. Water activity is inversely proportional to __________ _____________.
43. The optimal water activity for most bacteria is __________.
44. The ______ phase of the bacterial growth curve where there is greater metabolic activity.
45. We say that the growth in bacteria is exponential because ___________________ ________________________.
46. ​​Transition periods in the growth curve refer to the time ___________ ________________________ and are due to ____________ in ___________________.
47. The phase of the growth curve where there is great metabolic activity, but there is no
significant growth is the ________________.
48. The only techniques that determine viable growth are based on ____________________.
49. The Petroff-Hausser camera is used to make ____________________________________.
50. The turbidimetry method uses a ______________________ and is used to determine bacterial growth indirectly and is a method for ______________________.

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Related questions

61. The phase of the growth curve where industries get the most out of their
product is the _____________ and where the bacterial growth ceases is ___________.
62. In phase __________ the bacterial population remains relatively constant and the curve runs parallel to the abscissa.
63. In the __________ phase growth is exponential and continuous forming an ascending line.
64. Cells begin to die in the ________ or ________ phase. The line of this phase is descending, but generally it does not reach zero due to __________ _____________.
65. The importance of the growth curve is due to the fact that it has a great application in the
research and in the industry _____________ that manufacture antibacterial substances.
66. Changing conditions in the growing medium means that growth is reduced in the
phase _____________.
67. The period after inoculation in the growth curve of bacteria is known as ______________ and there is great activity of _____________ there.
68. The bacterial growth curve also applies to _______________________.
69. The phase where there is geometric growth is ___________.
70. Bacterial growth ceases for the following reasons: _____________, ______________, _____________, __________________ and ________________________.

Yellow seeds on a pea plant are an example of a/an ______.

Question 40 options:

1)

element.

2)

phenotype.

3)

environmental factor.

4)

genotype.

5)

allele.

A plant that produces white flowers is crossed to a plant that produces orange flowers. All of the offspring produced white flowers. What can you conclude?

Question 41 options:

1)

Orange flower color is the dominant phenotype.

2)

White flower color is the dominant phenotype.

3)

The genes for flower color do not assort independently.

4)

The genes for flower color are on separate chromosomes.

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Question 42 (1 point)

What units are bonded together to make a strand of DNA?

Question 42 options:

1)

Proteins

2)

Enzymes

3)

Cells

4)

Nucleotides

5)

Chromatids

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Question 43 (1 point)

Many modern-day trees are tall because ______.

Question 43 options:

1)

it is easier for tall tress to obtain water.

2)

tall tress obtain more sunlight, so they produce more offspring than short trees.

3)

tall trees offer less wind resistance.

4)

tall trees are less affected by disease.

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Question 44 (1 point)

An organism’s phenotype includes ______.

Question 44 options:

1)

its physical characteristics.

2)

its behavior.

3)

none of the above.

4)

both A and B.

Save

Question 45 (1 point)

Which of these is a correct order of taxonomic categories from less specific to more specific?

Question 45 options:

1)

Kingdom domain phylum order class family genus

2)

Domain phylum kingdom order class family genus

3)

Domain kingdom phylum class order family genus

4)

Domain kingdom class phylum order family genus

5)

Kingdom domain phylum class family order genus

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Question 46 (1 point)

In the scientific name of humans, Homo sapiens, the name “sapiens” is the ______.

Question 46 options:

1)

class.

2)

species.

3)

genus.

4)

order.

5)

family.

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Question 47 (1 point)

Cells occur singly and have a nucleus and other organelles, including chloroplasts. These cells move with flagella. They are ______.

Question 47 options:

1)

bacteria.

2)

protists.

3)

archaea.

4)

fungi.

5)

two of these are possible.

Save

Question 48 (1 point)

Cilia are ______.

Question 48 options:

1)

the cytoplasmic extensions or false feet used by some cell types for locomotion.

2)

different kinds of cells each designed to perform a different function.

3)

the circular chromosomes of bacteria.

4)

many short hair-like cellular extensions found on the surface of some protists.

5)

a few long whip-like extensions, used by protists for locomotion.

Save

Question 49 (1 point)

The state of having more than two full sets of chromosomes is called ______.

Question 49 options:

1)

autosomal.

2)

dominant.

3)

polyploidy.

4)

aneuploidy.

5)

nondisjunction.

Save

Question 50 (1 point)

Which of the following occurs in mitosis but NOT in meiosis?

Question 50 options:

1)

Cells genetically identical to parents are made.

2)

Crossing over.

3)

Independent assortment of chromosomes.

4)

Pairing up of similar chromosomes during prophase.

Yellow seeds on a pea plant are an example of a/an ______.

Question 40 options:

1)

element.

2)

phenotype.

3)

environmental factor.

4)

genotype.

5)

allele.

QuestionGroup: #37 CNS

Assigned as

Homework

37

Which parts of the brain contribute to our social behavior?

A

Orbitofrontal cortex

B

Mirror neurons

C

Amygdala

D

All of these are correct

Answered

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QuestionGroup: #38 CNS2

Assigned as

Homework

38

Part of the explanation of long term memory is which of the following?

A

Long term potentiation between neurons and muscle cells

B

Long term potentiation between neurons

C

Short term translation

D

Long term transcription

Answered

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QuestionGroup: #39 PNS

Assigned as

Homework

39

The somatic component of the peripheral nervous system has which of the following characteristics?

A

It controls the smooth muscle in the blood vessels so that blood vessels can vasoconstrict or vasodilate

B

It controls the autonomic nervous system so it indirectly controls heart rate

C

It controls your skeletal muscle so you can answer this question by pushing on the keyboard

D

It controls the smooth muscle in your intestinal tract so it controls peristalsis

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QuestionGroup: #40 Smooth/skeletal

Assigned as

Homework

40

Which of the following is NOT a part of a skeletal muscle cell?

A

Motor neurons

B

Nuclei

C

Sarcomeres

D

Actin

E

Myosin

Answered

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QuestionGroup: #41 Cardio

Assigned as

Homework

41

Which part of the circulatory system has the highest pressure?

A

Veins

B

Capillaries

C

Arteries

D

Aorta

Answered

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QuestionGroup: #42 Cardio2

Assigned as

Homework

42

Where do the electrical signals originate in your heart?

A

SA node

B

Internodal tracts

C

His-Purkinje System

D

AV node

Answered

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QuestionGroup: #43 Blood pressure

Assigned as

Homework

43

There was a horrific traffic accident and you run to help the victims. You feel a pulse from his carotid artery ,however the medic comes along and gets no blood pressure as he measures it from the arm. He claims the victim is dead. You think which of the following?

A

Medic is not correct since it is the difference between heart rate and blood pressure that determines life. No heart rate only means tha the sympathetics have stopped vasoconstricting the blood vessels.

B

Medic is correct since it is common to not have a blood pressure of 120/80 and no pulse due to stress as was discussed in class.

C

Medic is incorrect since there is a pulse. This means the person is still alive.

D

Medic is correct since there is no blood pressure there is no life.

Answered

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QuestionGroup: #44 Blood pressure2

Assigned as

Homework

44

Which side of the capillary bed has the higher oncotic pressure?

A

venous and lymph

B

arterial and lymph

C

lymph

D

venule side

E

arterial side

Answered

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QuestionGroup: #45 Capillaries

Assigned as

Homework

45

If the hydrostatic pressure is higher in the interstitial space rather than the capillary, which of the following will occur?

A

(2),(3)

B

(1),(2),(3)

C

(3) Decreased hydrostatic pressure in the arterial end of the capillary

D

(2) Decreased hydrostatic pressure in the venous end of the capillary

E

(1) No change in the hydrostatic pressure since this pressure is maintained regardless of external pressures.

Answered

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QuestionGroup: #46 Respiration/ ventilation

Assigned as

Homework

46

The left atrium is damaged and is generating a great resistance to blood coming from pulmonary vein. What happens due to this pressure?

A

Back up of blood in the pulmonary artery which causes pulmonary capillary edema

B

Generation of back flow into the inferior vena cava

C

Generation of coronary artery edema

D

Back up of blood in the pulmonary vein which causes pulmonary capillary edema

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QuestionGroup: #47 Respiration/ventilation 2

Assigned as

Homework

47

Edema in the pulmonary circulation refers to which of the following?

A

additional fluid in the trachea

B

additional interstitial fluid

C

additional surfactant

D

additional capillary fluid

E

additional intracellular fluid

Answered

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QuestionGroup: #48 Cell communication

Assigned as

Homework

48

What is the definition of a signaling pathway?

A

All the proteins in the nucleus

B

All the cell molecules in the mitochondria

C

A group of genes that control mitosis

D

A specific chemical pathway that is activated by the ligand/receptor complex.

Answered

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QuestionGroup: #49 Hormone/ menstruation

Assigned as

Homework

49

Which hormone directly causes ovulation?

A

Follicle stimulating hormone

B

Lutenizing hormone

C

Progesterone

D

Estrogen

E

All of these

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