Describe the molecular and transmission characteristics of Leber's hereditary optic neuropathy (LHON)
A) cytoplasmic inheritance, which includes mtDNA lesions
B) maternal inheritance, which includes mtDNA lesions
C) cytoplasmic inheritance, which includes cpDNA lesions
D) X-linked recessive
E) dominant maternal inheritance
Answer: A
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Answer the following statements true (T) or false (F)
1. Two species of three-spined stickleback fish live in a single lake in British Columbia. They are closely related but occupy different niches. They exist nowhere else. These species most likely arose by sympatric speciation from a single species of three-spined stickleback. 2. The pace of evolution remains constant despite sudden environmental shifts such as climate change. 3. Although most genetic sequence information is obtained from living species, it is sometimes possible to obtain DNA from small tissue samples of extinct species for use in constructing phylogenetic trees. 4. Alan Cooper, Cécile Mourer Chauviré, Geoffrey Chambers, Arndt von Haeseler, Allan Wilson and Svante Pääbo investigated the evolutionary relationships among some extinct and living species of flightless birds using tissue samples from museums and from living birds. This is an example of discovery-based science.
Which cells are produced during meiosis I?
a. spermatogonia b. primary spermatocytes c. secondary spermatocytes d. spermatids e. sperm
A(n) __________ has both biotic and abiotic components
a. population b. community c. ecosystem d. species e. genus
Name four plant structures that move water from soil to the air above the forest canopy (through a tree). For each named structure, describe how it works to move water into/within/out of the plant. In your answer, focus on how these structures allow a tree to move water high into the air without a mechanical pump; illustrate how this is possible with your answer
What will be an ideal response?