Whales have what seem like remnants of a pelvis and femur, as shown here.

What are these structures an example of?

transitional structures

analogous structures

vestigial structures

adapted structures

The Golgi complex in a cell interacts with A. the endoplasmic reticulum by producing ribosomes for the rough side of the structure. B. mitochondria by sending them nutrients for the production of ATP. C.

How many nucleotides are in 12 mRNA codons? 12 24 36 48

Population density is calculated by? a. dividing the number of organisms in a region by the land area b. multiplying the number of organisms in a region by the land area c. dividing the land area by the number of organisms in the region d.

When analyzing data, which does the scientist look for

Humans use what to pass on desired phenotypic traits to the next generation of organisms. A) natural breeding B) selective breeding C) selective insemination D) artificial fertilization

Why do many different types of proteins exist even though there are a limited number of amino acids

What is a difference between embryonic and adult stem cells? embryonic stem cells are undifferentiated; adult stem cells are partially differentiated. it is easier to enucleate embryonic stem cells.

A cell must be from a plant if the cell has:

What are two examples of the way the actions of humans harm some living things?

The chart shows the percentage of different elements in the human body. Which element is the most prevalent in the human body? (A) nitrogen (B) hydrogen (C) carbon (D) oxygen