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Biology
Wich of the following events separate geologic time into ears and periods
FILL IN THE BLANK 14 : Both starch and glycogen are forms of ——— 15: Describe the structure of a lipid . It has a ——— head and a ———— tail 16: list and describe the levels of protein structure . A . B. C. D. 17: Animals store glucose as ——— plants as ——— 18: enzymes lower the ——————— for a reaction . 19: what is the function of the “R group “ in a protein ?
The strongest muscle contractions are normally achieved by ________. a) increasing the stimulation up to the maximal stimulus b) increasing stimulus above the threshold c) increasing stimulus above the treppe stimulus d) recruiting small and medium muscle fibers
1) Sugar is classified into which nutritional group? 2) For a unicellular organism to live, what must it do? 3) Give an example of an organism that can cause a contagious disease.
Which five statements about hemoglobin and myoglobin structure are true? Each iron atom can form six coordination bonds. Two of these bonds are formed between iron and oxygen. Hemoglobin is a heterotetramer, whereas myoglobin is a monomer. Both hemoglobin and myoglobin contain a prosthetic group called heme, which contains a central iron atom. Each hemoglobin or myoglobin molecule can bind four oxygen molecules. Molecular oxygen binds reversibly to Fe2+ in heme. By itself, heme is not a good oxygen carrier. It must be part of a larger protein to prevent oxidation of the iron atom. Heme is composed of an organic protoporphyrin component and a metal atom.
Plate A has oceanic lithosphere on its leading edge that is 10 million years old. Plate B has oceanic lithosphere on its leading edge that is 200 million years old. Which plate will be subducted if they collide with each other, and why?
What sentence best supports the statement that hormones are involved in the regulation of homeostasis? A. The hormone melatonin induces sleep and its production is slowed by exposure to light. B. The hormone cortisol suppresses the immune system and is produced when the body is under stress. C. The hormone erythropoeitin increases the production of red blood cells when oxygen levels are low. D. The hormone oxytocin promotes labor contractions of the uterus during childbirth.
Why is having a large surface area important for a cell?
Which of the biomes has the broadest set of characteristics
It takes a lot of energy to change the temperature of water. This is important for both aquatic organisms and the Earth's weather and climate patterns. Which water property is responsible for the maintaining homeostasis in bodies of water? A) capillary action B) high heat capacity C) low heat of vaporization D) high heat of vaporization
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