Organisms that consume producers are _______.  

In humans, the initial X chromosome inactivation (the spreading phase) occurs during

In a DNA strand, a 5′ phosphate is connected to

A researcher conducted crosses between two different strains of Drosophila. When true-breeding flies with singed bristles (s) and normal wings (L) were crossed to true-breeding flies with normal bristles (S) and vestigial wings (l), all F1 offspring had normal wings and normal bristles. The F1 offspring were crossed to flies with singed bristles and vestigial wings. Which F2 offspring is/are nonrecombinant? 

What is the probability that this couple will have four children, three sons with short index fingers and one daughter long index fingers?

With regard to a maternal effect gene, a mother is dd and her haploid oocyte (d) is fertilized by a sperm carrying the D allele.  Which gene products would be found in this fertilized oocyte?

Which of the following statements regarding epigenetics is true?

Some fish have bony fins.  If the body of water they are in dries out, these fins can be used to help the fish “walk” to another body of water.  In this context, bony fins are an example of ________.  

The product rule is used to solve problems in which

The Endangered Species Act aims to help protect species that ________.