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TLS Online TPP Program

#Question id: 4655

Over evolutionary 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?

#Unit 11. Evolution and Behavior

  1. Natural selection cannot account for losses, only for innovations.

  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 find new habitats that these species had not previously used.

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TLS Online TPP Program

#Question id: 12571

#Unit 10. Ecological Principles

Although extinction is a natural process, current extinctions are of concern to environmentalists because
TLS Online TPP Program

#Question id: 28689

#Unit 2. Cellular Organization

 A special type of endoplasmic reticulum of muscle cells that involved in increasing the cytosolic Ca2+ concentration for skeletal muscle contraction ? 
TLS Online TPP Program

#Question id: 9184

#Unit 9. Diversity of Life Forms

Which aquatic biome listed here is one of the most productive on Earth, and why?
TLS Online TPP Program

#Question id: 23970

#Unit 8. Inheritance Biology

In an individual heterozygous, the normal chromosome loops out during chromosome pairing in prophase I, at which chromosomal rearrangements mutations?
TLS Online TPP Program

#Question id: 27630

#Unit 1. Molecules and their Interaction Relevant to Biology

α helices are common components of polypeptide chains, they need to be of a certain minimum length of then which of the following graph is correctly representing that certain minimum length condition