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TLS Online TPP Program

#Question id: 4978

The dicynodonts survived the mass extinction that was most closely correlated in time, if not in cause, with

#XL - S Microbiology

  1. snowball Earth.

  2. a large (10 km) meteor striking the Earth.

  3. an intense period of sun-spot formation, with subsequent increase in solar radiation.

  4. the formation of Pangaea and lava flows that covered large portions of Pangaea.

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TLS Online TPP Program

#Question id: 27338

#XL - T Zoology

In every cell, the number of tRNA molecules is at least_______?
TLS Online TPP Program

#Question id: 2660

#XL - T Zoology

In the lactose operon, the molecule that causes the repressor to fall off the promoter is which of the following?
TLS Online TPP Program

#Question id: 5597

#XL - T Zoology

Mammalian sperm will migrate against the direction of the flow—using CatSper calcium channels (like sea urchin sperm) to sense calcium influx and monitor the direction of the current, this process is known as:
TLS Online TPP Program

#Question id: 17282

#XL - S Microbiology

Which of the following is a land plant that produces flagellated sperm and has a sporophyte-dominated life cycle? 
TLS Online TPP Program

#Question id: 2123

#XL - T Zoology

Which of these statements about the composition of membranes is true?