Contraceptive methods that rely on synthetic hormones
A) destroy fertilized eggs.
B) prevent the implantation of a fertilized egg in the uterus.
C) prevent ovulation.
D) prevent the sperm and egg from meeting.
E) kill sperm.
C
You might also like to view...
Typical agricultural crops store how much of their absorbed solar energy in the form of biomass?
a. 0.1% to 0.5% b. 1% to 5% c. 10% to 50 % d. 100% e. 0.01% to 0.05%
The top priority for energy allocation in animals is
a. maintenance metabolism. b. growth. c. reproduction. d. storage. e. energy allocation is equal to these functions.
A biologist uses a time machine to collect living material from 2 different time periods. Sample A is 3 billion years old and sample B is 1.5 billion years old. How would these samples differ?
A. Eukaryotic organisms would be absent from sample A. B. Eukaryotic organisms would be present in both samples but much more common in sample B. C. Prokaryotic organisms would be abundant in sample A but absent from sample B. D. Prokaryotic organisms would only occur in sample B.
Regulatory elements:
a. are always found close to a gene. b. control the rate of mRNA production. c. are only found in animals. d. can be found using a Punnett square. e. have no effect on the phenotype.