If a mother has type O blood, which of the following blood types could NOT be present in her children?

 The phylum name Platyhelminthes is derived from two Greek words meaning

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.