Unit Test — Unit test Answers

Geralda is listing all the conditions under which natural selection occurs. So far, she has listed:The environment changes.Organisms in a population have different traits.Which other condition should she include in her list?

People living in some countries have a difficult time obtaining foods that are high in vitamin A.

Which statements describe gene therapy? Check all that apply. It cures all cases of cystic fibrosis.It involves the modification of DNA.It is easy to apply to all cells affected by the disorder.It attempts to replace a mutated gene with normal DNA.It does not always cure patients who use it.

Which structure carries instructions for producing the proteins that help make a person’s hair curly?

Which best describes a helpful genetic mutation?

Species X is an extinct animal. A scientist has discovered fossils of species X and compared them to species Y, a living animal that inhabits the same area where the fossils were found. The scientist has noted that the two animals share several physical characteristics.What can the scientist most likely conclude about the two types of animals?

Which nitrogen base sequence is the partner of T-C-A-G-C-A?

Which example best illustrates a condition necessary for natural selection to occur?

Which scenario would most likely result in the extinction of one or more species?

Which idea is most directly related to Lamarck’s beliefs about evolution?

Shira listed the steps for protein production in cells.1. A strand of RNA is made.2. RNA leaves the nucleus.3. RNA moves to the ribosome.4. A protein is made.

Which procedure is an attempt to correct a genetic disorder by replacing a mutated gene with a normal allele?

There are green and red bugs living in an area. As a result of an environmental change, birds that live in the same area grow in numbers. These birds eat the bugs, and they prefer the taste of the red bugs.

A mutation causes a tomato plant to have fewer and smaller leaves. Plants use their leaves to make food. Which best describes this mutation?

Which best describes a genetic mutation?

The picture shows the skull of an extinct aquatic animal and the skull of a present-day gray whale. Further testing of the skulls suggests that the extinct animal is an ancestor of the gray whale.

Due to a genetic mutation, a mouse is born with fur that is not as light as fur in other mice of the same population. This makes it easier for the mouse to blend into the environment.

What was known before Franklin and Wilkins conducted their studies of DNA? Select three options.DNA is found in the nucleus of a cell. The human genetic code is made of 50,000 genes.Organisms store and transmit genetic information. DNA has a double-helix structure. Cells contain protein molecules.