Which of the factors below weaken the hypothesis of abiotic synthesis of organic monomers in early Earthʹs atmosphere?

1.  the relatively short time between intense meteor bombardment and appearance of the first life forms

2.  the lack of experimental evidence that organic monomers can form by abiotic synthesis

3.  Uncertainty about which gases comprised early Earthʹs atmosphere

TLS Online TPP Program

#Question id: 26444

#Unit 3. Fundamental Processes

global genome repair (GG-NER) depending on proteins

TLS Online TPP Program

#Question id: 15382

#Unit 8. Inheritance Biology

In a group of fruit flies homozygous for an allele that causes a reduced number of thoracic bristles, you notice that the number of bristles varies from about half the normal number to only a few bristles. This is an example of which of the following?

TLS Online TPP Program

#Question id: 22962

#Unit 7. System Physiology – Animal

What is the relationship between calcium and PTH? 

a. When extracellular Ca2+ is decreased àCa2+ binding to the receptor àinhibits PTH secretion

b. When extracellular Ca2+ concentration is increased à Ca2+ binds to the receptor à activates phospholipase C àinhibits PTH secretion

c. When extracellular Ca2+ is decreased à Ca2+ doesn’t binds to the receptor àstimulates PTH secretion

d. When extracellular Ca2+ concentration is increased à Ca2+ binds to the receptor à activates phospholipase C àstimulates PTH secretion.

TLS Online TPP Program

#Question id: 19377

#Unit 12. Applied Biology

Glyphosate is a broad spectrum herbicide that inhibits the enzyme

TLS Online TPP Program

#Question id: 4362

#Unit 3. Fundamental Processes

How are bacteria able to change their patterns of protein synthesis so quickly in response to environmental changes?