What is the most important role of fungi in natural ecosystems?
How is the spinal cord like a major telephone line?
communication is like between brain and the body
Sometimes during a physical examination, a doctor performs a "knee-jerk reflex test on the patient. During this reflex test, a sharp rap on the knee causes the muscles in the leg to contract. why do you think this test is important?
It tests the peripheral nervous system. It checks the spinal cord and the reactions in the muscle
Why do larger organisms need a circulatory system?
To bring oxygen and nutrients to every cell and to get rid of carbon dioxide & waste, the organisms need a transportation system for the organs
Why is it better to inhale through your nose than through your mouth?
The nose moistens, filters and warms better than your mouth
Define what tissues do
Tissues are groups of similiar cells performing the same function
Define what organs do
Groups of tissues working together to complex functions
Why do more active people need to consume a diet higher in Calories than do people who get little exercise
The more active people burn more energy than the people the less active people
What are two reasons why eating is important to your body?
1. energy 2. raw material for growth and repair
Why is it important to eat foods that contain water-soluble vitamins every day?
Your body can not store them.
In figure 30-5, what is the digestive process
What does peristalis?
muscles in the walls of the esophagus contract in waves. Each wave pushed the bolus, in front of it o reach the stomach.
in figure 11-6, identify the genotype of the offspring that would be represented by the question mark?
in figure 11-6, identify the phenotype of the offspring represented by the question mark?
in figure 11-7, explain whether the alleles show dominance, incomplete dominance, or co dominance.
It is incomplete dominance
in figure 11-8, list stages in which the cells are 2N and those in which the cells are N
2N, 2N, 2N, N, N, N, N
What process did Griffith identify in the series of experiments with the mice and the bacteria?
What happened to the bacteria and the mice in experiment?
The mice died because a permanent transformation in the healthy bacteria occurred from the heat killed bacteria
What do the A, T, G and C stand for in figure 12-2
adanine, thymine, guanine, and cytosine
Who first did the experiments in figure 12-13 and what did they confirm?
Hershey & Chase. They found that DNA is genetic information that is found in genes.
Identify structure F in Figure 13-9. what does it specify
The structure is codon. It codes for alanine, a specific amino acid