How do animals obtain the nitrogen they use to make proteins and nucleic acids?

a.
by consuming plants or other animals

b.
by absorbing ammonia from bacteria growing in the roots of plants

c.
by breathing the nitrogen present in the atmosphere

d.
by absorbing nitrogen found in the soil

German cockroaches, bulging eyes, bu, are recessive to normal eyes, bu , and curved wings, cv, are recessive to straight wings, cv . both traits are encoded by autosomal genes that are linked. a cockroach has genotype bu bu cv cv, and the genes are in repulsion. which set of genes will be found in the most common gametes produced by this cockroach?

When proteins are being produced by a cell, scientist say that the genes are question 2 options: activated turned off replicated deactivated

Female luna moths (actias luna) attract males by emitting chemical signals that spread through the air. a male hundreds of meters away can detect these molecules and fly toward their source. the sensory organs responsible for this behavior are the comblike antennae visible in the photograph shown here. each filament of an antenna is equipped with thousands of receptor cells that detect the sex attractant. based on what you learned in this chapter, propose a hypothesis to account for the ability of the male moth to detect a specific molecule in the presence of many other molecules in the air. what predictions does your hypothesis make? design an experiment to test one of these predictions.