A food-chain of a rice field ecosystem is shown.

Snake

↑

Field rat

↑

Rice Plant

Field rats feed on rice grains.

How would the snake population of a rice field likely be affected in the year following a serious drought? Explain your answer.

Suppose that B is the dominant trait and b is the recessive trait. What are the chances that the offspring of these two parents will display the recessive trait?

Hemophilia is an x-linked recessive disease. Under which of the following conditions will a female child inherit hemophilia

The intervention of extraterrestrials has been used to explain the Bermuda Triangle, a region of the Atlantic Ocean where ships and planes are frequently lost, leaving no evidence behind.

One cell that undergoes meiosis will yield how many independent cells

Taya observed a plant that is small and grows close to the ground because it does not have the transport structures required to grow taller. Which plant phylum did this plant most likely belong to? conifers ferns mosses flowering plants

Identify twice substances that can cause changes in DNA

In which of the following cells can more than one nucleus be found? A. An unfertilized egg B. Neuron C. Sertoli cell D. Muscle fibre

1pt Blood is made up of A. nutrients, minerals, fats, and proteins B. oxygen, carbon dioxide, and sugar C. plasma, red blood cells, white blood cells, and platelets D. bone marrow cells and water

One of the first breakthroughs in biotechnology was the discovery of the gene that makes insulin. Part of this process involved scientists making DNA to match each possible sequence of insulin mRNA. What was the next step of this process? A.

Which of these modes of transmission require a bodily opening either natural or artificial?