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The medulla oblongata regulates breathing depth and frequency

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The medulla oblongata regulates breathing depth and frequency in response to: Question 5 options: pH changes in the blood O2 levels in the blood pH changes in the cerebrospinal fluid CO2 levels in the blood O2 levels in the cerebrospinal fluid

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Question 1

Medium

Match the following and choose the correct option.

Column - I

Column - II

A. Presence of 3-4 storey I. Blue-green algae
of plants grown in a forest
B. A biome having grasses II. Stratification
with scattered trees
C. Man made ecosystem III. Savannah
D. Pioneer in hydrosere IV. Dam

A – III; B – II; C – IV; D – I
A – III; B – I; C – IV; D – II
A – I; B – III; C – II; D – IV
A – II; B – III; C – IV; D – I

Topic:

Ecosystem

Book:

Xtract Objective Biology for NEET (Disha)

View solution

Question 2

Easy

In a food chain of grassland ecosystem, the top consumers are

Carnivores
Herbivores
Either carnivores or herbivores
Bacteria

Topic:

Ecosystem

Book:

Biology-for-NEET-Volume-2-Class-XII

View solution

Question 3

Easy

Identify the correct statement.

The smaller animals have larger surface area relative to their volume.
Smaller animals are rarely found in polar region.
Bear cannot migrate hence hibernate during winter.
All of the above

Topic:

Organisms and Populations

Book:

Xtract Objective Biology for NEET (Disha)

View solution

Question 4

Medium

Mycorrhiza is an example of:

Symbiotic relationship
Ectoparasitism
Endoparasitism
Decomposers

Topic:

Organisms and Populations

View 2 solutions

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How does the abiotic factor low pH relate to cellular reactions and function during homeostasis generally (in any/both environments)? (Explain at least 2 ways that this abiotic factor is important for normal cell function and signaling) What happens to cell biochemistry if this abiotic factor (low pH) becomes a stressor? In what way does habitat/environment affect how this abiotic stress is experienced by the organism? Are there differences between terrestrial and aquatic organisms in their potential exposure to this stressor? Give 2 examples of biochemical specializations that enable some organisms to handle low pH better than other organisms. Use one terrestrial example and one aquatic example. Discuss in your answer whether the abiotic stress occurs in the environment generally, or inside the organism at the cellular level. Compare and contrast the biochemical process, evolution, and fitness impacts in each of your examples.

Topic:

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Question 2

Your immune system can be affected in many ways. Below, you have three alterations in the Immune System. Please describe the following terms in relation to the immune system and provide an example of a reaction or disease that falls under each one. Hypersensitivity: Autoimmune: Immunodeficiency:

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Question 3

23. Label the subcellular structures and state their functions. A. B. C. D. E. Function: F. Function: G. Function: H. Function: 1. Function:

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Question 4

Please organize the structure labels into the correct order that the needle would go through. A needle, represented by the arrow in this diagram, is inserted through the embryonic membranes. Organize the structure labels into the correct order that the needle would go through. Embryonic Membranes and Structures Source Target Amniotic fluid Amnion Maternal side of placenta Yolk sac

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Question Text	The medulla oblongata regulates breathing depth and frequency in response to: Question 5 options: pH changes in the blood O2 levels in the blood pH changes in the cerebrospinal fluid CO2 levels in the blood O2 levels in the cerebrospinal fluid
Topic	All topics
Subject	Biology
Class	Class 12

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