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TLS Online TPP Program

#Question id: 4605

Over long periods of time, many cave-dwelling organisms have lost their eyes. Tapeworms have lost their digestive systems. Whales have lost their hind limbs. How can natural selection account for these losses?

#Section 2: Evolution

  1. Natural selection cannot account for losses, but accounts only for new structures and functions.

  2. Natural selection accounts for these losses by the principle of use and disuse.

  3. Under particular circumstances that persisted for long periods, each of these structures presented greater costs than benefits.

  4. The ancestors of these organisms experienced harmful mutations that forced them to lose these structures.

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TLS Online TPP Program

#Question id: 7696

#Section 2: Evolution

The following question refers to the following phylogenetic trees. Which tree depicts the microsporidians as a sister group of the ascomycetes?
TLS Online TPP Program

#Question id: 12140

#Section 1: Ecology

In some animal species, social organization involves the establishment of a system of ordered social rank instead of the occupancy of territories. Such a system of ordered social rank is referred to as a __________. 
TLS Online TPP Program

#Question id: 10876

#Section 1: Ecology

The result of a situation in which  is less than kl is 
TLS Online TPP Program

#Question id: 3430

#Section 4: Behavioural Ecology

The proximate causes of behavior are interactions with the environment, but behavior is ultimately shaped by
TLS Online TPP Program

#Question id: 12144

#Section 2: Evolution

Which statement regarding population growth rates is incorrect?