What evidence is there that choanoflagellates were the ancestors to animals? What will be an ideal response?


These protists have many features in common with sponges, the simplest animals. They are flagellated
and the use the flagella to draw water in from which they filter food. In addition, they express proteins
that resemble both adhesions proteins (that hold animal cells together) and animal signaling pathway
proteins (that aid in food and pathogen detection).

Biology & Microbiology

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Some genetic mutations occur from exposure to external agents called ____, such as radioactivity, ultraviolet radiation from the sun, and certain natural and human-made chemicals.

A) ?mutagens B) ?heritable traits C) ?keystones D) ?niches E) ?antibiotics

Biology & Microbiology

Although artificial selection may seem slow and unreliable, ____________________ observed that after only a few generations, breeders produced many varieties of pigeons and minks

Fill in the blank(s) with correct word

Biology & Microbiology

Which group of plants responds to increased CO2 with the highest biomass enhancement ratio?

A) C3 B) C4 C) CAM D) all respond equally

Biology & Microbiology

Features that contributed to success on land include a(n) __________ that protects spores.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology