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TLS Online TPP Program

#Question id: 12259

Which of the following is an example of exploitation competition? 

#Section 1: Ecology
  1. Fungi limit the growth of bacteria in their vicinity by releasing antibiotics
  2. Hummingbirds chase other hummingbirds away from flowering plants
  3. The population of one plant species reduces an essential nutrient element below the minimum level required to support the population of a second plant species, which is eliminated
  4. Shrubs of the genus salvia release toxic chemicals that inhibit the growth of other vegetation
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TLS Online TPP Program

#Question id: 8930

#Section 2: Evolution

Soon after the coelom begins to form, a researcher injects a dye into the coelom of a deuterostome embryo. Initially, the dye should be able to flow directly into the
TLS Online TPP Program

#Question id: 8931

#Section 2: Evolution

A researcher is trying to construct a molecular-based phylogeny of the entire animal kingdom. Assuming that none of the following genes is absolutely conserved, which of the following would be the best choice on which to base the phylogeny?
TLS Online TPP Program

#Question id: 8935

#Section 2: Evolution

What may have occurred to prevent species that are of the same grade from also belonging to the same clade?
TLS Online TPP Program

#Question id: 11401

#Section 2: Evolution

In a hypothetical situation, a bacterium lives on the surface of a leaf, where it obtains nutrition from the leafʹs nonliving, waxy covering, while inhibiting the growth of

other microbes that are plant pathogens. If this bacterium gains access to the inside of a leaf, it causes a fatal disease in the plant. Once the plant dies, the bacterium

and its offspring decompose the plant. What is the correct sequence of ecological roles played by the bacterium in the situation described here? Use only those that

apply.

1.  nutrient recycler          2.  mutualist            3.  commensal              4.  parasite          5.  primary producer
TLS Online TPP Program

#Question id: 11402

#Section 2: Evolution

How can prokaryotes be considered to be more successful on Earth than humans?
TLS Online TPP Program

#Question id: 11499

#Section 2: Evolution

Biologists have long been aware that the defunct kingdom Protista is paraphyletic. Which of these statements is both true and consistent with this conclusion?