Some beetles and flies have antler-like structures on their heads, much like male deer. The existence of antlers in beetle, fly, and deer species with strong male-male competition is an example of ________.

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#Question id: 12513

#Unit 7. System Physiology – Animal

A 26-year-old construction worker is brought to the emergency room with a change in mental status after working a 10-hour shift on a hot summer day (average outside temperature was 97°F). The man had been sweating profusely during the day but did not drink fluids. He has a fever of 102°F, heart rate of 140 beats/min, and blood pressure of 100/55 mm Hg in the supine position. On examination, he has no perspiration, appears to have dry mucous membranes, and is poorly oriented to person, place, and time. Assuming that his kidneys were normal yesterday, which of the following sets of hormone levels describes his condition, compared with normal?

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#Question id: 8955

#Unit 9. Diversity of Life Forms

Which of the following characteristics generally applies to protostome development?

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#Question id: 21118

#Unit 12. Applied Biology

What are the advantages of biosensors in agriculture?

 Easy to handle

 Measures non-polar molecules

 Gives accurate readings

Longer storage

Which of the following options are incorrect?

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#Question id: 23190

#Unit 13. Methods in Biology

If we want to view live cells which microscopy can be best used for this?

1. Structured illumination microscopy

2. Phase contrast microscopy

3. Scanning electron microscopy

4. Cryoelectron microscopy

Which of the following option has correct combination?

TLS Online TPP Program

#Question id: 8720

#Unit 9. Diversity of Life Forms

The question refers to the following table, which compares the percent sequence homology of four different parts (two introns and two exons) of a gene that is found in five different eukaryotic species. Each part is numbered to indicate its distance from the promoter (for example, Intron I is the one closest to the promoter). The data reported for species A were obtained by comparing DNA from one member of species A to another member of species A.

Which of these four gene parts should allow the construction of the most accurate phylogenetic tree, assuming that this is the only part of the gene that has acted as a reliable molecular clock?