4. Write the names of all four nitrogenous bases: A __ T __ C __ __ Start building the model by pairing the nitrogen bases. Pair all bases before proceeding. A __ pairs with T __ C __ pairs with __ 5. Start building your molecule upwards by locking four nucleotides together, In your model, the sugar of the lower nucleotide bonds with the __ of the upper nucleotide. Once you finish assembling the base pairs, continue to form the helical structure by connecting the sugar-phosphate sides of the ladder. 6. Add another pair of nucleotides. Your molecule is now three nucleotides long and all nucleotides are paired up (so your molecule has a total of six nucleotides). 7. Visit another group. Compare your DNA model to the DNA model made by the other group and answe the following questions:

Which tissue type or organ is correctly matched with its germ layer tissue? muscular -ectoderm skin-ectoderm stomach -mesoderm nervous -mesoderm

Which substances do plants produce as waste products? carbon dioxide and uric acid oxygen and urine carbon dioxide.and oxygen carbon dioxide and urine

Plant cells that are usually alive at maturity include all of the following except parenchyma cells collenchyma cells guard cells vessel elements

The type of muscle that pumps blood throughout the body is? Skeletal muscle Smooth muscle Valentine muscle Cardiac muscle

9. The rectum and kidneys work to help eliminate body wastes. help blood circulate. aid in digestion. aid in respiration.

A student claims that glucose is the raw material for the production of cellulose, which comprises the cell wall of plant cells. Here are various statements made by the student. 1. Cellulose is made up of repeating glucose units. 2. Cellulose and glucose are carbohydrates. 3. Cellulose cannot be easily digested by animals. 4. Cellulose is found in large amounts of plant cells. Which statement supports the student's claim? Statement 1 Statement 2 Statement 3 Statement 4

These blood vessels have the lowest blood pressure: A. arteries B. arterioles C. veins D. capillaries

Question 5 (0.5 points) Identify a postcranial characteristic of hominins. single-arched pes or foot relatively abductable big toe long os coxae with a narrow iliac blade shortened phalanges of pedal digits $2-5$

Multiple Choice Question Mucous, serous, and synovial are types of __ body membranes epithelial tissue joints bones

Cases in which fertile hybrids can be produced but the number of hybrids in the population stays small is consistent with the __ Species Concept Ecological Biological Divergent Sympatric