Georgia Science Grade 7

Chapter 22: Regulation and Reproduction

CRCT Practice

1
According to the information in the graph, in which year was the syphilis rate the lowest?

<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078778425/516795/cj.jpg','popWin', 'width=354,height=318,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (31.0K)</a>
A)1976
B)1982
C)1988
D)1993
2
According to the information in the graph, during which years was there a decrease in the syphilis rate?

<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078778425/516795/cj.jpg','popWin', 'width=354,height=318,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (31.0K)</a>
A)1970–1972
B)1976–1982
C)1988–1990
D)1990–1993
3
Researchers have found that the B-vitamin folic acid can prevent neural tube defects. In a study done in Europe in 1991, one group of pregnant women was given extra folic acid, and the other group did not receive extra folic acid.What percentage of babies

<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078778425/516795/ck.jpg','popWin', 'width=378,height=226,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (32.0K)</a>
A)1.0%
B)2.5%
C)3.0%
D)4.0%
4
What percentage of babies were born with a neural tube defect in Group I?

<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::ck::/sites/dl/free/0078778425/516795/ck.jpg','popWin', 'width=378,height=226,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif">ck (32.0K)</a>ck
A)1.0%
B)2.5%
C)3.0%
D)4.0%
5
Which of the following statements is true regarding the data in this table?

<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::ck::/sites/dl/free/0078778425/516795/ck.jpg','popWin', 'width=378,height=226,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif">ck (32.0K)</a>ck
A)Folic acid had no effect on the percentage of babies with a neural tube defect.
B)Extra folic acid decreased the percentage of babies with a neural tube defect.
C)Extra folic acid increased the percentage of babies with a neural tube defect.
D)Group I and Group II had the same percentage of babies born with a neural tube defect.
6
When do eggs start to develop in the ovaries?
A)before birth
B)at puberty
C)during childhood
D)during infancy
7
Which of the following glands is found in the neck?
A)pineal
B)adrenal
C)thyroid
D)pancreas
8
What is the mixture of sperm and fluid called?
A)semen
B)testes
C)seminal vesicle
D)epididymis
9
According to the illustration, what percentage of the menstrual cycle is phase 2?

<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0078778425/516795/cl.jpg','popWin', 'width=380,height=234,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (28.0K)</a>
A)25%
B)50%
C)75%
D)100%
Glencoe Online Learning CenterScience HomeProduct InfoSite MapContact Us

The McGraw-Hill CompaniesGlencoe

Please read our Terms of Use and Privacy Policy before you explore our Web site. To report a technical problem with this Web site, please contact the Web Producer.