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Questions in biology

[Homework Help] In 1796, Dr. Edward Jenner, a British physician, first used a technique on a young orphan boy by deliberately putting serum containing the cowpox virus into his arm to prevent him from getting smallpox. That technique today is referred to as: A. disease B. incubation period C. immunization or vaccination D. tetanus

[Homework Help] Describe what happened when the mimosa leaf was touched. Step 1 Step 2 The leaves of the mimosa plant were touched A. The leaves closed up. B. The leaves died. C. The leaves stayed the same. D. The leaves open further.

[Homework Help] How does the three-dimensional shape of the enzyme impact enzymatic activity? A. Changes in enzyme shape trigger release of the catalytic product. B. Changes in enzyme shape regulate the rate of the catalytic reaction. C. Enzyme shape determines the type of substrate that binds in the active site. D. Enzyme shape affects how many substrate molecules can bind at once.

[Homework Help] What is a common but unsustainable way some farmers respond to crop failure? A. Reducing water usage B. Planting more native species C. Switching to organic farming D. Using chemical fertilizers and pesticides

[Homework Help] What is the main type of cell destroyed by Alzheimer's? A. Synapse B. Myelin sheath C. Neurons D. Glia

[Homework Help] Write the names of two trees found in each of the following forests: 1. Evergreen: 2. Deciduous: 3. Thorn: 4. Mountain: 5. Tidal:

[Homework Help] Choose the correct answer and fill in the blanks. a. ________ (Rose/Lily) is a water plant. b. Cactus grows in the ________ (beach/desert). c. ________ (Papaya/Potato) is a fruit.

[Homework Help] What is the name of the connective tissue layer that serves as covering for bone and is well vascularized as well as highly innervated? a. Cartilage b. Fascicle c. Periosteum d. Physis e. None of the above

[Homework Help] Answer the following questions: a. What makes an environment? b. How do animals help plants? c. What benefits can we derive from animals? d. How do bees help the following organisms? i. human ii. Plant e. Make a list of environmental factors affecting animals and plants. f. Mention the benefits of sunlight and soil to living things. g. What does a plant need to make food? h. Describe the interrelationship between the organism and the environment. i. Write down how animals and plants can benefit from water. Earthworms are very useful organisms for soil and plants. Justify this statement.

[Homework Help] Which hormones are produced by the pancreas? A. epinephrine and norepinephrine B. oxytocin and ADH C. calcitonin and PTH D. insulin and glucagon