Which factor would be involved in density-independent population growth?

All the genes located on a given chromosome compose a ________.

What is the expected phenotypic ratio resulting from a homozygous recessive X heterozygous cross?                      

In an experiment, the researcher is trying to examine the effects of artificial sweeteners on the germination of radish seeds.  She gives the plants in Group A sugar.  Plants in Group B receive NutraSweet.  Plants in Group C get Sweet & Low.  She finds that those in Group A have the longest roots after two weeks.  There is also a group D.  What is the dependent variable?

A somatic cell with two of each type of chromosome characteristic of the species has a (n) _____ chromosome number.

Species fit along a continuum of r- and K-selection; not all species show purely r traits or purely K traits. For example, sparrows produce several young per year but only live a few years, while the wandering albatross first reproduces at age 10 and then produces a single egg every other year during its 40-year life span. Compared to the albatross, the sparrow is more

Name the four subregions of the ancient Near East.

A file has r = 25,000 STUDENT records of fixed length. Each record has the following fields: Name (65 bytes), Ssn (9 bytes), Address (85 bytes), PHONE (20 bytes), Birth_date (8 bytes), Sex (1 byte), Major_dept_code (4 bytes), Minor_dept_code (4 bytes), Class_code (4 bytes, integer), and Degree_program (46 bytes), an additional byte is used as a deletion marker. Consider the block size B=512 bytes, and blocking factor Bfr = B div R (R is the record size). Also, for an index on the SSN field, assume the field size Vssn = 32 bytes, assume the record pointer size Pr = 16 bytes. (Note: show your computation completely to get the whole points for each section).Calculate the record size R in bytes.Calculate the blocking factor bfr and calculate the number of file blocks b, assuming an unspanned organization.Calculate the number of block accesses needed to search and retrieve a record from the file, given its Ssn value and using the primary index.

Note: same information for questions 20-25, except where otherwise noted. A small country is engaged in free international trade with a large country. There are two sectors (goods): sector (good) x and sector (good) y. There are three factors of production: labor, which is perfectly mobile across the two sectors; land, which is specific to good x; and capital, which is specific to good y. The solid lines of the following figure represent: Px MPLx for the small country as a function of Lx, measured from origin O; and Py MPLy as a function of Ly, measured from origin O*. The length of the base of the figure is L=2000, the total units of labor in the country. One unit of labor is one worker working for a year. The scale on the vertical axis is thousands of dollars. Note that each grid spacing on the horizontal represents 50 workers, and each grid spacing on the vertical axis represents 1 thousand dollars. NOTES:            – Ignore the dashed line until it is mentioned below. – Since this is a graphical question, some of the answers may be approximate! For all remaining questions in this group, suppose that labor can move freely from one sector to another. For the remainder of this group, suppose that the price of good y doubles, resulting in the dashed line, labeled P’y MPLy. When the price of good y doubles, the impact on workers is ______. To explain this, we need to understand that ______ .

The United States trades much more with Ireland than is predicted by the size of their economies and the distance between the two countries (the gravity model). All of the following answers help in explaining this fact, except one answer. Which of the answers does NOT help in explaining why the United States trades more with Ireland than predicted by the gravity model?