The question asks for the term describing a biological process where an organism starts as a female and later changes into a male. This involves understanding different types of sequential hermaphroditism.
D) protogyny is the biological phenomenon where an organism is born as a female and later undergoes a sex change to become a male. This is common in many fish species, such as wrasses and groupers, often triggered by social cues or environmental factors.
The question asks to identify the mineral for which 'Malanjkhand' is a famous mine in India. This requires knowledge of major mining locations and their associated minerals in India.
Correct Option: D) Copper
The question asks about the nature of magnetic field lines inside a solenoid. Understanding the magnetic field produced by a current-carrying solenoid is a fundamental concept in electromagnetism. We need to recall the characteristics of magnetic field lines for an ideal solenoid.
Correct Option: D) parallel lines
Inside a long, ideal solenoid, the magnetic field lines are straight, parallel, and uniformly spaced, indicating a uniform magnetic field. They run parallel to the axis of the solenoid.
Refer to the following letter, number, symbol series and answer the question that follows.
(Left) Z C & T % 7 D 9 # 6 K & 2 R Y S 3 5 E * 4 (Right)
How many such symbols are there which are immediately preceded by a letter and also immediately followed by a number?
The problem asks us to identify the number of symbols in the given series that satisfy two conditions: they must be immediately preceded by a letter and immediately followed by a number. We need to scan the series from left to right and check each symbol against these conditions.
B) 3 is the correct answer because there are three symbols (% , & , *) in the series that are immediately preceded by a letter and immediately followed by a number.
What was the implementation period of the 12th Five-Year Plan in India?
The question asks for the implementation period of the 12th Five-Year Plan in India. This requires knowledge of the historical timeline of India's Five-Year Plans.
Correct Option: D) 2012 – 2017
To find the position of the image formed by a convex mirror, we use the mirror formula, which relates the object distance, image distance, and focal length. It's crucial to apply the sign conventions correctly for convex mirrors.
Identify the given values and sign conventions:
Apply the mirror formula:
The mirror formula is given by:
Substitute the values into the formula:
\[ \frac{1}{10} = \frac{1}{v} + \frac{1}{-30} \]Solve for \(v\):
\[ \frac{1}{10} = \frac{1}{v} - \frac{1}{30} \]\[ \frac{1}{v} = \frac{1}{10} + \frac{1}{30} \]\[ \frac{1}{v} = \frac{3}{30} + \frac{1}{30} \]\[ \frac{1}{v} = \frac{3+1}{30} \]\[ \frac{1}{v} = \frac{4}{30} \]\[ \frac{1}{v} = \frac{2}{15} \]\[ v = \frac{15}{2} \]\[ v = +7.5 \text{ cm} \]Interpret the result:
The positive sign for \(v\) indicates that the image is formed behind the mirror, which is characteristic of a virtual image formed by a convex mirror. The image is formed at a distance of \(7.5 \text{ cm}\) behind the mirror.
Compare with the options:
The calculated image distance is \(7.5 \text{ cm}\). This value lies between \(0 \text{ cm}\) and \(10 \text{ cm}\).
B) a point between 0 cm and 10 cm. The image is formed at \(+7.5 \text{ cm}\), which is between \(0 \text{ cm}\) and \(10 \text{ cm}\) behind the mirror.
To find the median of a set of observations, we first need to arrange the observations in ascending order. Once arranged, the median is the middle value if the number of observations is odd. If the number of observations is even, the median is the average of the two middle values.
20, 20, 20, 20, 20, 20, 23, 25, 30, 31, 32, 35, 41, 42, 43
Therefore, the median of the given observations is 25.
B) 25 — As calculated in the step-by-step explanation, after arranging the 15 observations in ascending order, the 8th value is 25, which is the median.
The question asks to identify the organ where cartilage tissue is absent. To answer this, we need to recall the common locations of cartilage in the human body and then determine which of the given options does not contain cartilage.
A) Kidney — The kidney is a parenchymatous organ primarily composed of epithelial and connective tissues, but it does not contain cartilage. Its main function is filtration of blood and urine formation.
The problem states that two triangles, \(\triangle ABC\) and \(\triangle FDE\), are congruent. Congruence means that corresponding sides and corresponding angles are equal. We are given some measurements for \(\triangle ABC\) and need to find the corresponding measurements for \(\triangle FDE\).
Understand Congruence: The notation \(\triangle ABC \cong \triangle FDE\) means that:
This implies that corresponding sides are equal in length and corresponding angles are equal in measure.
Identify Corresponding Sides and Angles:
Use Given Information for \(\triangle ABC\):
Calculate \(\angle C\) for \(\triangle ABC\): The sum of angles in a triangle is \(180^\circ\).
\[ \angle A + \angle B + \angle C = 180^\circ \]Substitute the known values:
\[ 70^\circ + 60^\circ + \angle C = 180^\circ \]\[ 130^\circ + \angle C = 180^\circ \]\[ \angle C = 180^\circ - 130^\circ \]\[ \angle C = 50^\circ \]Determine Corresponding Values for \(\triangle FDE\):
Evaluate the Options:
Correct Option: B) \(DF = 6 \text{ cm}, \angle E = 50^\circ\)
The question asks to identify the hockey goalkeeper among the recipients of the Major Dhyan Chand Khel Ratna Award in 2021. This requires knowledge of the awardees and their respective sports/positions.
The Major Dhyan Chand Khel Ratna Award (formerly Rajiv Gandhi Khel Ratna Award) is India's highest sporting honour. In 2021, 12 sportspersons were awarded. Among them, several were from hockey.
Based on this information, PR Sreejesh is the only hockey goalkeeper among the given options who received the award in 2021.
A) PR Sreejesh is an Indian field hockey goalkeeper and was one of the recipients of the Major Dhyan Chand Khel Ratna Award in 2021.