An older friend of yours who has been a dedicated jogger for many years has been having mild knee pain recently when jogging longer distances. He tells you his doctor recommended better-cushioned running shoes. He wonders why better shoes on his feet
will help his knees. Using the material you learned about the skeletal system, what can you say to help your friend understand his doctor's recommendation?
What will be an ideal response?
The knee joint has shock-absorbing cartilage that can wear with age (part of the story of osteoarthritis). Anything that helps reduce impact will help prevent further damage.
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The dotted line in the figure above indicates ____
a. a polar covalent bond b. van der Waals forces c. an ionic bond d. a hydrogen bond e. a nonpolar covalent bond
All of the following are used in the
development of science except one. Select the exception.
a. evaluation of data b. personal conviction c. prediction d. systematic observation e. experiments
Choose the mRNA sequence that is complementary to the gene sequence GGACTTACG.
A. CCTGAATGC B. AACUGGCUA C. GGTCAATCG D. CCUGAAUGC
You are a forensic biologist and have been asked to review the files of an old, unsolved murder case. The autopsy report is missing a lot of important information, but you read that the victim had a thymus gland that was just starting to shrink
Based on this information alone, what can you conclude about the victim? A) He died of natural causes, most likely an autoimmune disease. B) His lymphatic system was infected and being destroyed by an unknown virus. C) He was between 12 and 16 years old. D) He was between 1 and 6 years old.