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TLS Online TPP Program

#Question id: 12340

Keystone species are thought to have profound effects on the structure and composition of ecological communities because they

#Unit 10. Ecological Principles
  1. Tend to reduce diversity by eliminating food resources for other species
  2. Provide the foundation for food webs
  3. Are more abundant than most other species in their communities
  4. Can prevent superior competitors from driving inferior competitors to local extinction
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TLS Online TPP Program

#Question id: 3829

#Unit 3. Fundamental Processes

Why is only one copy of DNA made per cell division cycle in eukaryotes despite the presence of multiple origins of replication?
TLS Online TPP Program

#Question id: 26454

#Unit 3. Fundamental Processes

Which of the following is incorrect related to prokaryotic promoter search
TLS Online TPP Program

#Question id: 33515

#Unit 2. Cellular Organization

A. Mitochondrial genomes vary in total size by more than an order of magnitude. 
B. Animal cells have larger mitochondrial genomes. 
C. There are several hundred mitochondria per cell and each mitochondrion has multiple copies of the DNA. 
D. The total amount of mitochondrial DNA relative to nuclear DNA is small; it is estimated to be 10%.

Find correct order of true and false statements
TLS Online TPP Program

#Question id: 19478

#Unit 12. Applied Biology

Cyt protein is a parasporal inclusion (crystal) protein from B. thuringiensis that exhibits 
TLS Online TPP Program

#Question id: 2288

#Unit 2. Cellular Organization

Proteins lacking a signal peptide sequence will probably found in