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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: 104

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is the simplest lipids but they may be a part of or a source of many complex lipids.
TLS Online TPP Program

#Question id: 24210

#Unit 1. Molecules and their Interaction Relevant to Biology

The human genome encodes four different hexokinases (I to IV), all of which catalyze the same reaction. If Two or more enzymes that catalyze the same reaction but are encoded by different genes are called to be
TLS Online TPP Program

#Question id: 1335

#Unit 4. Cell Communication and Cell Signaling

Essentially a one-dimensional structure that protrudes from a cell and contains a core of long, bundled actin filaments is known as
TLS Online TPP Program

#Question id: 2733

#Unit 2. Cellular Organization

The third strand of triple helix is paired in which scheme?
TLS Online TPP Program

#Question id: 2967

#Unit 2. Cellular Organization

G1 is associated with which of the following cellular events?