Which of the following molecules contains the fewest covalent bonds?
A. Chlorine molecule
B. Ammonia molecule
C. Methane molecule
D. Water molecule
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A chlorine molecule contains the fewest covalent bonds among the options provided. It consists of two chlorine atoms bonded together by a single covalent bond. Compared with the other options, ammonia has three covalent bonds, methane has 4 while water has 2.
Therefore, the Correct Answer is A.
More Questions on TEAS 7 Science Exam 5
Question 1:
in pea plants, green pod color (6) is dominant to yellow pod color ( A cross was done between a plant with green pods and a plant with yellow pods. Of the resulting offspring 50% had green pods and 50% had yellow pods. Which of the following were the genotypes of both parent plants?
A. Ggx Gg
B. GG x gg
C. Gg x gg
D. gg x gg
The Correct Answer is C.
|
|
G |
g |
|
g |
Gg |
gg |
|
g |
Gg |
gg |
Question 2:
Which structure of the female reproductive system is the source of the blood and mucosal tissue during menstruation? (You will find hot spots to
Select in the image below. Select only the hot spot that corresponds to your answer.
A.
B.
C.
D.
The Correct Answer is B.The inner lining of the uterus is the source of blood and mucosal tissue that is shed during menstruation.
Question 3:
Which of the following distinguishes endocrine and exocrine glands from another?
A. The presence or absence of ducts
B. The effect their secretions have on the target cells
C. The biochemistry of their secretions
D. The presence or absence of nerve innervation
The Correct Answer is A.Exocrine glands secrete their products into ducts that carry them to the target organs. In contrast, endocrine glands secrete their products directly into the bloodstream, which carries them to target cells throughout the body.
Question 4:
The "gray matter of the brain is largely made up of which of the following?
A. Neuron cell bodies
B. Meninges
C. Neuron cell axons
D. Corpus callosum
The Correct Answer is A.The gray matter of the brain primarily consists of neuron cell bodies, along with dendrites, glial cells, and unmyelinated axons. It appears gray because it lacks the white fatty myelin sheath that covers many nerve fibers.
Question 5:
in which of the following locations does fertilization of an egg cell typically occur?
A. Fallopian Tube
B. Ovary
C. Uterus
D. Cervical canal
The Correct Answer is A.Fertilization occurs in the fallopian tube and not in the ovary, uterus, or cervical canal.
Question 6:
The vermiform appendix extends from the region of the large intestine known as which of the following?
A. jejunum
B. Rectum
C. Cecum
D. Achi
The Correct Answer is C.The vermiform appendix is a small, finger-like projection that extends from the cecum, which is the first part of the large intestine.
Question 7:
Which of the following atoms is most likely to become a cation?
A. Oxygen, atomic number 8
B. Fluorine, atomic number 19
C. Helium, atomic number 2
D. Fluorine, atomic number 9
The Correct Answer is D.Fluorine has a high electronegativity, and therefore, it has a strong attraction for electrons and tends to gain electrons to form anions. Therefore, it is more likely to become a cation by losing an electron.
Question 8:
In order to determine the effects of energy drinks on women's running speed, researchers gave 300 women an energy drink and then recorded the time it took each of them to run 2 miles. After collecting the results, researchers concluded that energy drinks increase the speed of running in
Which of the following further tests would best help to support this conclusion?
A. Repeat the same experiment, using 300 men
B. Repeat the experiment giving half of the women water and the other half the energy drink
C. Repeat the experiment giving the women two different energy drinks
D. Repeat the experiment, having half of the women run 2 miles and the other half run 5 miles
The Correct Answer is B.Conducting the experiment with half the women taking water and the other half taking an energy drink creates a study and experimental group, which can allow for comparison and conclusion. The researchers can compare the effects of the energy drink directly with a baseline, and this helps to establish a cause-and-effect relationship and provides stronger evidence to support their conclusion.
Question 9:
A represents atomic mass and 2 represents an atomic number, which of the following describes an atom after a proton is emitted?
A. A-1,2-1
B. A-1,2+1
C. A,2-1
D. A+1,2-1
The Correct Answer is A.This is because when a proton is emitted from an atom, the atomic mass decreases by one unit, and the atomic number decreases by one unit. The atomic mass is the sum of protons and neutrons in the nucleus, and the atomic number is the number of protons in the nucleus. Therefore, if a proton is lost, both numbers decrease by one.
Question 10:
Which of the following correctly orders structures from simple to complex?
A. Organs, tissues, cells, atoms
B. Cell, tissues, atoms, organs
C. Atoms, organs, tissues, cells
D. Atoms, cells, tissues, organs
The Correct Answer is D.Rationale
Atoms are the smallest and most basic units of matter, and they can combine to form molecules. Cells are the basic units of life, and they are made of molecules. Tissues are groups of cells that work together to perform a specific function, such as muscle tissue or nerve tissue. Organs are collections of tissues that form a larger structure.