Among enzymes required for DNA replication, ligases are needed to form bonds between nucleotides to join DNA segments.

A. covalent
B. ionic
C. hydrogen
D. weak chemical
E. peptide bonds


A. covalent

Biology & Microbiology

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It is believed that phototrophy arose approximately 3.3 billion years ago in

A) Bacteria. B) Archaea. C) Eukarya. D) LUCA.

Biology & Microbiology

One square meter of open ocean areas supports more phytoplankton growth than a comparable coastal water area

Indicate whether the statement is true or false

Biology & Microbiology

The release of cyclic AMP as a second

messenger is a response to ____ hormones. a. peptide b. steroid c. protein d. peptide and protein e. peptide, steroid, and protein

Biology & Microbiology

The organism was found to have two lungs, but the left lung was much smaller than the right lung. Kelly added that the herpetology instructor had said that in most snakes, the same condition exists

If the size difference between the lungs in this organism is not a shared ancestral characteristic with its occurrence in snakes, then its existence in this organism is explained as which of the following? 1. a result of convergent evolution 2. an example of homologous structures 3. a similar adaptation to a shared lifestyle or body plan 4. a result of having identical Hox genes A) 1 only B) 1 and 3 C) 2 and 3 D) 3 and 4

Biology & Microbiology