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Science (English Medium) इयत्ता १२ - CBSE Question Bank Solutions for Biology

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Biology
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A biology student after studying the different levels of hormones during the menstrual cycle was comparing 2 subjects (Patients). A table was created after looking at the levels of hormones A and B for Subjects 1 and 2. Read the information in the table and answer the question that follows.

  HORMONE A HORMONE B
Subject 1 Shows a peak on the 14th Day of the menstrual cycle. Falls down during the luteal phase.
Subject 2 Shows a peak on the 14th Day of the menstrual cycle. The level is maintained high in the luteal phase.

The peak observed in Subject 1 and 2 is due to ______ 

[2] Human Reproduction
Chapter: [2] Human Reproduction
Concept: undefined >> undefined

A biology student after studying the different levels of hormones during the menstrual cycle was comparing 2 subjects (Patients). A table was created after looking at the levels of hormones A and B for Subjects 1 and 2. Read the information in the table and answer the question that follows.

  HORMONE A HORMONE B
Subject 1 Shows a peak on the 14th Day of the menstrual cycle. Falls down during the luteal phase.
Subject 2 Shows a peak on the 14th Day of the menstrual cycle. The level is maintained high in the luteal phase.

Subject 2 has a higher level of hormone B, which is ______

[2] Human Reproduction
Chapter: [2] Human Reproduction
Concept: undefined >> undefined

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A biology student after studying the different levels of hormones during the menstrual cycle was comparing 2 subjects (Patients). A table was created after looking at the levels of hormones A and B for Subjects 1 and 2. Read the information in the table and answer the question that follows.

  HORMONE A HORMONE B
Subject 1 Shows a peak on the 14th Day of the menstrual cycle. Falls down during the luteal phase.
Subject 2 Shows a peak on the 14th Day of the menstrual cycle. The level is maintained high in the luteal phase.

If the peak of Hormone A does not appear in the study for Subject 1, which of the following statement is true?

[2] Human Reproduction
Chapter: [2] Human Reproduction
Concept: undefined >> undefined

A biology student after studying the different levels of hormones during the menstrual cycle was comparing 2 subjects (Patients). A table was created after looking at the levels of hormones A and B for Subjects 1 and 2. Read the information in the table and answer the question that follows.

  HORMONE A HORMONE B
Subject 1 Shows a peak on the 14th Day of the menstrual cycle. Falls down during the luteal phase.
Subject 2 Shows a peak on the 14th Day of the menstrual cycle. The level is maintained high in the luteal phase.

Which structure in the ovary will remain functional in subject 2?

[2] Human Reproduction
Chapter: [2] Human Reproduction
Concept: undefined >> undefined

A biology student after studying the different levels of hormones during the menstrual cycle was comparing 2 subjects (Patients). A table was created after looking at the levels of hormones A and B for Subjects 1 and 2. Read the information in the table and answer the question that follows.

  HORMONE A HORMONE B
Subject 1 Shows a peak on the 14th Day of the menstrual cycle. Falls down during the luteal phase.
Subject 2 Shows a peak on the 14th Day of the menstrual cycle. The level is maintained high in the luteal phase.

For subject 2 it is observed that the peak for hormone B has reached the plateau stage. After approximately how much time will the curve for hormone B descend?

[2] Human Reproduction
Chapter: [2] Human Reproduction
Concept: undefined >> undefined

A biology student after studying the different levels of hormones during the menstrual cycle was comparing 2 subjects (Patients). A table was created after looking at the levels of hormones A and B for Subjects 1 and 2. Read the information in the table and answer the question that follows.

  HORMONE A HORMONE B
Subject 1 Shows a peak on the 14th Day of the menstrual cycle. Falls down during the luteal phase.
Subject 2 Shows a peak on the 14th Day of the menstrual cycle. The level is maintained high in the luteal phase.

Which of the following statements is true about the subjects?

[2] Human Reproduction
Chapter: [2] Human Reproduction
Concept: undefined >> undefined

The biggest constraint of plant breeding is ______.

[8] Strategies for Enhancement in Food Production
Chapter: [8] Strategies for Enhancement in Food Production
Concept: undefined >> undefined

Identify the correct statement from the following:

[2] Human Reproduction
Chapter: [2] Human Reproduction
Concept: undefined >> undefined

Why are menstrual cycles absent during pregnancy?

[2] Human Reproduction
Chapter: [2] Human Reproduction
Concept: undefined >> undefined

Mention the importance of LH surge during menstrual cycle.

[2] Human Reproduction
Chapter: [2] Human Reproduction
Concept: undefined >> undefined

A human female experiences two major changes, menarche and menopause during her life. Mention the significance of both the events.

[2] Human Reproduction
Chapter: [2] Human Reproduction
Concept: undefined >> undefined

What are the events taking place in the ovary and uterus during follicular phase of the menstrual cycle.

[2] Human Reproduction
Chapter: [2] Human Reproduction
Concept: undefined >> undefined

Given below is a flow chart showing ovarian changes during menstrual cycle. Fill in the spaces giving the name of the hormones responsible for the events shown.

[2] Human Reproduction
Chapter: [2] Human Reproduction
Concept: undefined >> undefined

What role does pituitary gonadotropins play during follicular and ovulatory phases of menstrual cycle? Explain the shifts in steroidal secretions.

[2] Human Reproduction
Chapter: [2] Human Reproduction
Concept: undefined >> undefined

STDs can be considered as self-invited diseases. Comment.

[3] Reproductive Health
Chapter: [3] Reproductive Health
Concept: undefined >> undefined

Suggest the reproduction-related aspects in which counselling should be provided at the school level.

[3] Reproductive Health
Chapter: [3] Reproductive Health
Concept: undefined >> undefined

STDs are a threat to reproductive health. Describe any two such diseases and suggest preventive measures.

[3] Reproductive Health
Chapter: [3] Reproductive Health
Concept: undefined >> undefined

Sonalika and Kalyan Sona are varieties of ______.

[8] Strategies for Enhancement in Food Production
Chapter: [8] Strategies for Enhancement in Food Production
Concept: undefined >> undefined

Which one of the following is not a fungal disease?

[8] Strategies for Enhancement in Food Production
Chapter: [8] Strategies for Enhancement in Food Production
Concept: undefined >> undefined

Several South Indian states raise 2-3 crops of rice annually. The agronomic feature that makes this possible is because of ______.

[8] Strategies for Enhancement in Food Production
Chapter: [8] Strategies for Enhancement in Food Production
Concept: undefined >> undefined
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CBSE Science (English Medium) इयत्ता १२ Question Bank Solutions
Question Bank Solutions for CBSE Science (English Medium) इयत्ता १२ Biology
Question Bank Solutions for CBSE Science (English Medium) इयत्ता १२ Chemistry
Question Bank Solutions for CBSE Science (English Medium) इयत्ता १२ Computer Science (C++)
Question Bank Solutions for CBSE Science (English Medium) इयत्ता १२ Computer Science (Python)
Question Bank Solutions for CBSE Science (English Medium) इयत्ता १२ English Core
Question Bank Solutions for CBSE Science (English Medium) इयत्ता १२ English Elective - NCERT
Question Bank Solutions for CBSE Science (English Medium) इयत्ता १२ Entrepreneurship
Question Bank Solutions for CBSE Science (English Medium) इयत्ता १२ Geography
Question Bank Solutions for CBSE Science (English Medium) इयत्ता १२ Hindi (Core)
Question Bank Solutions for CBSE Science (English Medium) इयत्ता १२ Hindi (Elective)
Question Bank Solutions for CBSE Science (English Medium) इयत्ता १२ History
Question Bank Solutions for CBSE Science (English Medium) इयत्ता १२ Informatics Practices
Question Bank Solutions for CBSE Science (English Medium) इयत्ता १२ Mathematics
Question Bank Solutions for CBSE Science (English Medium) इयत्ता १२ Physical Education
Question Bank Solutions for CBSE Science (English Medium) इयत्ता १२ Physics
Question Bank Solutions for CBSE Science (English Medium) इयत्ता १२ Political Science
Question Bank Solutions for CBSE Science (English Medium) इयत्ता १२ Psychology
Question Bank Solutions for CBSE Science (English Medium) इयत्ता १२ Sanskrit (Core)
Question Bank Solutions for CBSE Science (English Medium) इयत्ता १२ Sanskrit (Elective)
Question Bank Solutions for CBSE Science (English Medium) इयत्ता १२ Sociology
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