The last common ancestor of all animals was probably a

TLS Online TPP Program

#Question id: 34133

#Unit 7. System Physiology – Animal

Which of the following would be least likely to be seen 14 days after a rat is injected with a drug that kills all of its pancreatic B cells?

TLS Online TPP Program

#Question id: 5249

#Unit 8. Inheritance Biology

What is the best explanation for why Bernard Davis didn't observe generalized transduction in his U tube experiments?

TLS Online TPP Program

#Question id: 8936

#Unit 9. Diversity of Life Forms

Organisms showing radial symmetry would likely

TLS Online TPP Program

#Question id: 19082

#Unit 4. Cell Communication and Cell Signaling

Some necrotrophs produce host‐selective toxins as toxin that are active in only a few plant species; produced by the fungal pathogen Cochliobolus carbonum of maize (Zea mays) inhibits Plant enzyme such as___

TLS Online TPP Program

#Question id: 16132

#Unit 13. Methods in Biology

You are running a human assisted reproduction clinic and providing state-of-the-art genetic diagnostic services. A married couple who already had a child with cystic fibrosis approach you because they wish to have another child, but only if they can be assured that the child will not have cystic fibrosis. You genotype the woman and discover that she is a heterozygote for Del508, the most common mutation causing cystic fibrosis. You suggest that the couple consider first polar body testing, in which several unfertilized oocytes (each with its first polar body) are retrieved from the woman, the first polar bodies are removed, and PCR tests are conducted on DNA from each of the first polar bodies. The couple agrees, and you obtain the following results:

 

the observation that the polar bodies for oocytes #1 and #5 test positive for both Del508 and the wild type sequence, because