| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.44 |
| Score | 0% | 69% |
Which of the following is the smallest component of an element that still retains the properties of the element?
neutron |
|
element |
|
atom |
|
molecule |
An atom is the smallest component of an element that still retains the properties of the element.
The __________ is a system of muscles that allows breathing.
trachea |
|
bronchioles |
|
diaphragm |
|
pulmonary |
The diaphragm is a system of muscles that allows breathing. During inhalation, the diaphragm expands and air rushes in to fill the space created. Then, during exhalation, the diaphragm contracts and forces the air back out.
A __________ is the smallest multi-atom particle of an element or compound that can exist and still retain the characteristics of the element or compound.
molecule |
|
neutron |
|
isotope |
|
ion |
A molecule is the smallest multi-atom particle of an element or compound that can exist and still retain the characteristics of the element or compound. The molecules of elements consist of two or more similar atoms, the molecules of compounds consist of two or more different atoms.
Which of the following indicates the correct reproductive sequence?
zygote → ovum → fetus |
|
none of these are correct |
|
ovum → zygote → fetus |
|
ovum → fetus → zygote |
During intercourse, the penis ejaculates sperm, produced in the testes, into the vagina. Some of the sperm makes their way to the uterus where, if they encounter an egg to fertilize, unite with the ovum to form a fertilized egg or zygote. The zygote then may implant in the uterus and eventually develop into a fetus.
In taxonomy, domains are the broadest classification of life. How many domains are there?
dozens |
|
5 |
|
3 |
|
6 |
The broadest classification of life splits all organisms into three groups called domains. The three domains of life are bacteria, archaea and eukaryota.