What do chordates have that makes them different?

A. no body cavities

B. a notochord

C. under-developed organ systems

The purpose of introducing weakened microbes into the body of an organism is to stimulate the

Settlement can be directly turned into which type of rocks

Two genes of a flower, one controlling blue (b) versus white (w) petals and the other controlling round (r) versus oval (o) stamens, are linked and are 10 map units apart. you cross a homozygous blue-oval plant with a homozygous white-round plant.

1. mutations cause A. DNA screenings B. genetic finger prints C. genetic disorders D. protein synthesis

An abiotic factor affecting the behavior and survival of birds is the A) length of daylight. B) number of carnivores. C) presence of harmful bacteria. D) size of the insect population.

Slice of cheese is 3.0°C and is sitting on a dish that is 3.0°C. If the dish and cheese are in a refrigerator that is set to 3.0°C, which of the following statements is true? a.

Some types of organisms can increase genetic variation through reproduction. They are able to combine the genetic material of two parents, rather than copying the genetic material of a single parent. Which organisms are capable of this?

Unlike a lytic infection, a lysogenic infection a. allows viruses to remain inactive for a while within a host. b. involves a host. c. requires a virus to inserts its nucleic acid into a host cell's DNA. d. involves a virus and its nucleic acid.

Fill a bucket with water. Wait until the water stops moving around and becomes completely still. Tap the side of the bucket and watch what happens. Ripples form on the surface of the water.

Discuss the order in which seed dispersal mechanisms could have evolved