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I WILL GIVE YOU 30 EXTRA POINTS IF YOU HELP ME WITH THIS SHORT ANSWER QUESTION!! Carbon may be in the environment for millions of yeasts before it is released into the air where living things can use it. Give an example of how this might happen.

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I WILL GIVE YOU 30 EXTRA POINTS IF YOU HELP ME WITH THIS SHORT ANSWER QUESTION!! Carbon may be in the environment for millions of yeasts before it is released into the air where living things can use it. Give an example of how this might happen.

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Question 1

Easy

LSD is obtained from

bryophyte
pteridophyte
brown algae
fungus

Topic:

Human Health and Disease

Book:

Xtract Objective Biology for NEET (Disha)

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Question 2

Medium

A normal woman whose father was colourblind, marries a normal man. What kinds of children can be expected and in what proportion?

All daughters normal, $50%$ of sons colourblind
All daughters normal, all sons colourblind
$50%$ daughters colourblind, all sons normal
All daughters colourblind, all sons normal

Topic:

Principles of Inheritance and Variation

Book:

CBSE New Pattern Biology Class 12 for 2021-22 Exam MCQs based book for Term 1

View 2 solutions

Question 3

Medium

Which of the following is not a major positive feedback mechanism in which the activity of humans to increase global climate temperatures leads to an even further increase?

Global warming causes increased rainfall, plant growth and photosynthesis
Global warming causes increased $C O_{2}$ release from biomass decomposition
Tropical deforestation causes warming and drying so that remaining forests begin to decline
Global warming causes snow to melt in polar regions and therefore increases global albedo

Topic:

Environmental Issues

Book:

Dr. Ali Objective Biology

View 2 solutions

Question 4

Medium

Select the false statements -
I. An antibody is a protein molecule made by the lymphocytes.
II. An antibody binds to a specific foreign antigen and neutralizes its odd effects,
III. A type of acquired immune response is called cell-mediated immunity. This type of immunity is mediated by T lymphocytes.
IV. Cancer is contagious and cells can spread from one person to another.
V. Cancerous cells fire highly differentiated cells.
VI. Cancer detection is based on biopsy and histopathological studies of the tissue and blood.
VII. Techniques like radiography, CT and MRI are very useful to detect cancers of the internal organs.
VIII. Diseases which are easily transmitted from one person to another, are called infectious diseases.
IX AIDS is non-infectious and cancer is infectious disease,
X

S a l m o n e ll a t y p hi

is a pathogenic bacterium which causes typhoid fever in human beings.
XI. Sustained high fever (39° to 40°C), weakness, stomach pain, constipation, headache and loss of appetite are some of the common symptoms of typhoid.
XII. Nicotine stimulates thyroid Gland.
XIII. Smoking increases

C O_{2}

content in blood.
XIV. AIDS has no cure, prevention is the best option.
XV. HIV/AIDS infected people should be shunned by society.

I, IV
IV, V, IX,XII, XIII,XV
AII
None

Topic:

Human Health and Disease

Book:

Dr. Ali Objective Biology

View solution

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A protein binds to untranslated mRNA, moves to the polymerase, and disrupts transcription. Release factors recognize the stop codons and cause the RNA polymerase to fall off the DNA. The sigma subunit of the RNA polymerase recognizes specific sequences in the DNA and causes the RNA polymerase to dissociate. An endoribonuclease cuts the mRNA. A stem-loop followed by U's in the mRNA disrupts the RNA:DNA hybrid in the transcription bubble.

Topic:

Biology

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Question 2

Explain (don't list) the three manners in which neurotransmitter activity is terminated at the synapse. 2. If the neurotransmitter released opened a K+ channel, would that lead to an EPSP or an IPSP? Explain your choice. 3. Fluoxetine is a drug that slows the activity of serotonin reuptake transporters. Explain how this will alter levels of serotonin in the synaptic cleft.

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Biology

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Question 3

When viewed by electron microscopy, the lipid bilayer is often described as looking like a railroad track. Explain how the structure of the bilayer creates this image.

Topic:

Biology

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Question 4

Question 2 of 10 Which statement best describes a scatterplot? O

It shows qualitative data grouped by similarities.
It shows quantitative data that relate two variables.
It shows data points connected by a single line.
It shows data as a percentage of a whole.

Topic:

Biology

View solution

Question Text	I WILL GIVE YOU 30 EXTRA POINTS IF YOU HELP ME WITH THIS SHORT ANSWER QUESTION!! Carbon may be in the environment for millions of yeasts before it is released into the air where living things can use it. Give an example of how this might happen.
Topic	All topics
Subject	Biology
Class	Class 12

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