Aman with type a blood marries a woman with type ab blood. according to predicted outcomes based on genetics, their children may have all blood types except type a)

a. b) a

b. eliminate

c) b.

d) o.

as scientists have developed more productive crop varieties, farmers have switched from growing many traditional varieties to new high-yield varieties. for example, in peru, the indians once grew 500 native varieties of potatoes. that number has been reduced to about twenty major potato varieties, worldwide.

why is it potentially dangerous to reduce the number of crop species in potatoes?

a) it reduces the variety of crops available for human diets.

b) it requires a larger investment than small farmers can make.

c) it makes the overall crop more susceptible to pests or disease.

d) it could reduce or cause the extinction of some predatory insects.

all of the statements were part of the original cell theory proposed by schleiden and schwann with the exception of

a) all cells come from other cells.

b) the cell is the most basic unit of life.

c) all living things are composed of one or more cells.
eliminate

d) viruses are not living since they are smaller than a cell.

infectious diseases are caused by organisms called pathogens. pathogens can be bacteria, viruses, fungi, or protists. one common disease caused by a fungus is

a) the flu.

b) hiv/aids.

c) athlete's foot.

d) parkinson's disease.

your science teacher has asked the class to make a cell city model. which building or business in the city could represent the mitochondria, and why?

a) city dump - waste storage

b) city hall - control center

c) roads - transportation system

d) power company - produces energy

which structures are found in the human female reproductive system?

a) ovaries and uterus

b) ovaries and testes

c) prostate and uterus

d) uterus and vas deferens

in organisms that reproduce sexually, meiosis produces the male and female haploid gametes. what is the name of the process that joins the two haploid cells together to form a diploid?

a) fertilization

b) fusion

c) ovulation

d) spermatogenesis

the fossil beds at the falls of the ohio, located between louisville, kentucky and clarksville, indiana, are world-renowned. there are 212 species of corals known found in these fossil beds. consider the environmental conditions under which most coral lives. which scenario most likely describes the ancient environment of the falls?

a) dry, hot, and near the equator

b) temperate, northern latitudes, underwater

c) tropical, near the equator, and underwater

d) tropical, at the boundary of two tectonic plates

what is the relationship between the dna and protein in a cell?

a) dna is made up of proteins that are synthesized in the cell

b) protein is composed of dna that is stored in the cell

c) dna controls the production of proteins in the cell

d) the cell is composed of dna and protein

one of the parents of a child with phenylketonuria (pku), which is caused by autosomal recessive alleles. the other parents does not have the pku alleles. what is the chance that the couple will have a child with phenylketonuria 9pku)?
a) 0%
b) 50%
c) 75%
d) 100%

which of the following best compares the structures of lipids and carbohydrates?

a) both are made up of monnosaccharide monomers, but lipids are hydrophobic and carbohydrates are hydrophophilic.

b) both consist of carbon and hydrogen, and oxygen, but carbohydrates have repeating structurual units and lipids do not.

c) both have carbon and hydrogen, but carbohydrates have repeating structural units and lipids do not.

d) both have a carbon backbone, but lipids also have an amino group and carbohydrates have a carboxylic group.

which of he following best describes the difference between the functions of nucleic acids and enzymes?

a) nucleic acids are used as the building blocks of proteins, while enzymes are used as the building blocks of phospholipids.

b) nucleic acids contain the genetic code for protein synthesis, while enzymes catalyze chemical reactions.

c) nucleic acids inhibit biochemical reactions, while enzymes provide structural support in cells.

d) nuceic acids transmit signals that begin biochemical processes, while enzymes convert carbohydrates into lipids and proteins.