BIOLOGY HIGH SCHOOL

Doug plants a few peas. After two days, he sees the shoot and the root forming. He observes that the shoot grows upward, toward the light. The root grows downward, into the soil. Why do these embryonic organs grow in a specific direction?A. The shoot is positively phototropic and positively gravitropic; the root is positively phototropic and positively gravitropic.

B. The shoot is positively phototropic and negatively gravitropic; the root is positively gravitropic and negatively phototropic.

C. The shoot is positively gravitropic and negatively phototropic; the root is positively phototropic and negatively gravitropic.

Answers

Answer 1
Answer: The answer is B. The shoot is positively phototropic and negatively gravitropic; the root is positively gravitropic and negatively phototropic.

Phototropism is reaction of a plant to a light stimulus. Growth of the plant or its part grow towards the light stimulus is called positive phototropism. Growth of the plant or its part away from the light stimulus is called negative phototropism.
Gravitropism is reaction of a plant to gravity. Growth of the plant or its part in the same direction as gravity is called positive gravitropism. Growth of the plant or its part grow in the opposite direction of gravity is called negative gravitropism.

The shoot is positively phototropic (grows toward the light) and negatively gravitropic (grows upward, in opposite direction of gravity).
The root is negatively phototropic (grows into the soil, away from the light) and positively gravitropic (grows downward, in the same direction as gravity).
Answer 2
Answer:

Answer:

B for plato

Explanation:

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Answers

Answer:

The two processes that fuel the carbon cycle are photosynthesis and cellular respiration.

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Answers

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Answers

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Answers

Answer:

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Answers

The order of the lumen layers is mucosa, submucosa, muscularis externa, and serosa. The correct option is D.

What is alimentary canal?

The gastrointestinaltract is indeed the digestive tract or passageway that connects the mouth to the rectum. In humans and other animals, the GI tract contains all of the major organs of the digestivesystem, including the esophagus, stomach, and intestines.

The alimentarytract's primarily chief function is to transform food into absorbable particles and transport them to the body's other organs.

Every organ of the alimentarycanal has the same four basic layers, from the esophagus to the rectalcanal.

Mucous membrane, submucosa, muscular layer, and serous layer are the correct layers within the alimentary canal wall from inside to outside.

Thus, the correct option is D.

For more details regarding alimentary canal, visit:

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a, the only logical answer, in biology most questions are logic based, eliminate the impossible answers and what remains will be correct 
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