Which set of compounds make up a nucleotide?
Answer options with 5 options
A.
adenine−phosphate−uracil
B.
adenine−ribose−phosphate
C.
adenine−ribose−potassium
D.
cytosine−adenine−guanine
E.
guanine−glucose−phosphate
B. adenine−ribose−phosphate
Which molecule is a main component of fatty acids?
Answer options with 4 options
A.
glycerol
B.
glucose
C.
ribose
D.
peptide
A. glycerol
A scientist studies a population of lizards isolated on a tropical island over many years. During the study, several rats are accidentally introduced to the island. The rats prey on the lizards. The scientist notices that the lizards with the longest legs run the fastest and are more likely to outrun the rats. Over several more generations, the scientists finds that while the range of leg lengths in the lizards changes little, the average leg length has increased.
Which ,begin emphasis,two,end emphasis, statements explain the scientist's observations?
Answer options with 5 options
A.
Lizards needed to run faster to escape the rats, so they developed longer legs.
B.
By running faster to escape the rats, the lizards made their legs slowly grow longer over time.
C.
Predation by rats caused new mutations in the lizards, which caused their legs to grow longer.
D.
Lizards with longer legs are more likely to survive and reproduce than lizards with shorter legs.
E.
There was already variation in the genes controlling leg length in the lizard population before the rats arrived.
D. Lizards with longer legs are more likely to survive and reproduce than lizards with shorter legs.
E. There was already variation in the genes controlling leg length in the lizard population before the rats arrived.
Students are creating a model to show how plants and animals are involved in carbon cycling.
What is the role of each component in the carbon cycle? Move the correct answer to the box to show how carbon moves between systems.
Response area with 3 blank spaces

Blank space 1 empty
Blank space 2 empty
Blank space 3 empty
Answer options with 6 options.
The answer options for each blank space are as follows:
Blank space 1: Plants (photosynthesis)
Blank space 2: Atmosphere (respiration)
Blank space 3: Animals (consumption/decomposition)
Please note that the options provided are general and simplified, and there are additional components and processes involved in the carbon cycle.