#Question id: 4725
#Unit 8. Inheritance Biology
Ptosis (droopy eyelid) may be inherited as a dominant human trait. Among 30 people who are heterozygous for the ptosis allele, 10 have ptosis and 20 have normal eyelids. What is the penetrance for ptosis?
#Question id: 20715
#Unit 12. Applied Biology
#Question id: 11573
#Unit 7. System Physiology – Animal
Removing which of the following glands would have the most wide-reaching effect on bodily functions of an adult human?
#Question id: 17072
#Unit 12. Applied Biology
#Question id: 56
#Unit 1. Molecules and their Interaction Relevant to Biology
Trace elements are those required by an organism in only minute quantities. Which of the following is a trace element that is required by humans and other vertebrates, but not by other organisms such as bacteria or plants?