Counter the following argument: "Sexual reproduction is just an accident of evolution, once established it is irreversible. We do not need to invoke specific benefits to explain its maintenance."

What will be an ideal response?


ANS:
There are recently evolved asexual lineages; due to the twofold costs of sex they should replace sexual populations if it wasn't for benefits offsetting this cost.

Biology & Microbiology

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Influenza virus can exhibit constant mutation of viral glycoproteins, called antigenic ________, or alternatively antigenic ________, which is a more serious phenomenon caused by the exchange of a viral gene with that of another influenza virus strain.

A. drift; exchange B. exchange; drift C. shift; drift D. drift; shift

Biology & Microbiology

The ____________ is a disk-shaped cloud of icy bodies believed to extend from about 40 AU (the orbit of Pluto) out to 100 AU. It is believed that most short-period comets originate from this region

a. Oort cloud b. Widmanstätten cloud c. Apollo-Amor d. Kirkwood region e. Kuiper belt

Biology & Microbiology

The form of asexual reproduction used by a hydra is called __________. Fill in the blank(s) with the appropriate word(s)

Biology & Microbiology

Compare and contrast the starting materials, processing steps, and microbes used in brewing beer and making wine.

What will be an ideal response?

Biology & Microbiology