Sewing thread is very thin and difficult to see once a length of thread is removed from its spool. How is the thread and spool an analogy for what happened to the DNA in Step 7.

Who first identified nucleic acids, and where were they discovered

The circular muscle of the mouth a. Frontalis b. Orbicularis oris

Pku (phenylketonuria) is an autosomal recessive disease, in which the synthesis of amino acid tyrosine from phenylalanine is blocked. as a result, an excess of phenylalanine gets converted into phenylketones, which appear in the urine.

you are running an experiment trying to figure out how water affects plant growth for three orchid plants you recently bought. The orchids are the same species and you will place the plants next to eachother in the same windowsill.

1. When during the cell cycle is a cell's DNA replicated? A) G1 Phase B) G2 Phase C) S Phase D) M Phase 2.

The benefit of social behavior that refers to searching for and collecting food is referred to as

Which of the following is the effect to contractile vacuole when Amoeba sp is placed in salt water? A. Burst and die B. Stop contracting C. Contract at fast rate D. Contract at slow rate

Which geochemical cycle involves mantle convection? Nitrogen Tectonic Hydrologic Carbon

Energy can be changed from one form to another. Changes in the form of energy are called energy conversions. In an automobile engine, fuel is burned to convert _energy into heat energy. The energy is then changed into energy.

Describe electron carriers and the electron transport chain.