The hypodermis is composed of ____
blood vessels ? insulation
oil glands ? insulation
a. adipose and nervous tissues
b. connective and adipose tissues
c. blood and lymphatic vessels
d. hair follicles and sweat glands
e. sebaceous and sweat glands
ANSWER: b
You might also like to view...
Nearly all cells use ATP as their primary energy source. This is evidence that ___________________
A. life continues to evolve and use novel energy sources B. ATP evolved recently (in the last 100 years) as a potential source of energy C. the use of ATP by cells began eons ago and has been conserved D. only eukaryotic cells can produce ATP E. fossil fuels are composed of ATP
Adrenoleukodystrophy (ALD) is a fatal disease that results from the inability of liver cells to transport very long chain fatty acids (VLCFAs) across the peroxisomal membrane. It is diagnosed by the presence of high levels of VLFCAs in the blood. The disease results in destruction of brain myelin leading to progressive cognitive impairment, coma, and death by the age of 14. ALD is an X-linked recessive condition, and there has never been a case of ALD described in girls. You have just started your internship at the Mayo clinic and a 10-year-old girl comes in who is in a coma and having seizures. Blood tests show she has extremely elevated levels of long-chain fatty acids. This looks like ALD, but a girl has never been afflicted. When you go to your supervisor to give your diagnosis, which
of the following hypotheses do you present to support it? A. The patient's mother and father are both recessive carriers of ALD. B. Most of the Barr bodies in the patient's liver have a normal peroxisome gene. C. The patient's mother is a carrier for ALD. D. The patient has Turner syndrome. E. The patient's mother is a carrier, and the young girl has either only genetically normal Barr bodies in the liver or the girl has Turner syndrome.
Clown fishes form symbiotic relationships with members of this group of cnidarians:
a. siphonophores. b. hydrozoans. c. anthozoans. d. scyphozoans. e. bryozoans.
A geneticist is studying a particular Drosophila mutant that produces a phenotype of "no wing" due to a mutation in a gene called wingless. She takes the mutant wingless and mutagenizes it. She hypothesizes that any fly that emerges with wings will be
due to the original mutated gene reverting back to the wild-type allele. From this study, she identifies a fly that now has wings. When she sequences the wingless gene, she discovers that the original mutation is still there, and there are no other mutations in the wingless gene. However, a second gene at a separate locus is mutated. The second mutation is best classified as a(n) ________. A) conditional mutation B) intergenic suppressor mutation C) haploinsufficiency mutation D) intragenic suppressor mutation E) null mutation