Question Discussion & Solution

The correct answer is Both 2 and 3.

Key Points

• Both mitochondria and chloroplasts  possess their own genetic material thus, they are called as semi-autonomous organelles.
• The mitochondrial DNA and plastid DNA possess genes which produce the proteins necessary for the functioning of mitochondria and chloroplasts  respectively.

• Mitochondria (sing.: mitochondrion), unless specifically stained, are not easily visible under the microscope.
• The number of mitochondria per cell is variable depending on the physiological activity of the cells.
• In terms of shape and size also, a considerable degree of variability is observed.
• Typically it is sausage-shaped or cylindrical having a diameter of 0.2-1.0µm (average 0.5µm) and length 1.0-4.1µm.
• Each mitochondrion is a double membrane-bound structure with the outer membrane and the inner membrane dividing its lumen distinctly into two aqueous compartments, i.e. the outer compartment and the inner compartment.

Answer: Option 3

Concept:

Tree:

• A tree consists of nodes or vertices that store information and often are labeled by a number or a letter.
• A tree consists of directed edges or undirected edges or both.
• The number of subtrees of a node is called its degree.
• A leaf or a terminal node is a node of degree zero
• A node that is not a leaf is called an interior node or an internal node
• The degree of a node is the number of its children. The degree of a tree is the maximum degree of any of its nodes.

Ancestors of a node in a Tree: 

The ancestor nodes of a node are all parent nodes of that particular node.

Explanation: 

Consider the following Binary Tree 

Every node except the root node (A) has ancestors.

Hence in a tree, the only node that has no ancestors is the root node. (only one node possible)

Additional Information

Full Binary Tree: 

A full binary tree is a binary tree in which each node has exactly two or 0 children.

Complete Binary Tree:

A complete binary tree is a binary tree in which

1. except last level tree is completely filled.
2. The last level is filled from left to right.

Perfect Binary Tree: 

A perfect binary tree is a binary tree in which

1. all interior node or internal nodes has 2 children.
2. all leaves are at the same level.

Balanced Binary Tree: 

A Balanced Binary tree is a binary tree in which at any node height of the left subtree and right subtree do not differ by more than 1.

Important Points

1. A tree with n nodes has n - 1 edge.

2.  consider a nonempty binary tree with n0 leaves and n2 nodes of degree two (internal nodes). Then
n0 = n2 + 1
Applications of Trees: 
1. Huffman Coding
2. Evaluation of Arithmetic Expressions using Expression trees

The correct answer is Mangifera indica.

Key Points

• Mangifera indica is the botanical name of mango.
  • In this name, Mangifera represents the genus while indica is a particular species.
• Scientific name
  • This system was given by Carolus Linnaeus.
  • Each name has two components – the Generic name and the specific epithet.
  • This system of providing a name with two components is called Binomial nomenclature.

Additional Information

• Monoon longifolium is an Asian small tree species in the family Annonaceae. Common names include false Ashoka, the Buddha tree, the Indian mast tree, and the Indian fir tree.
• Cocos nucifera is a Coconut tree. It is a tall tree that is native to tropical islands in the western Pacific. 
• Casuarina is a nitrogen-fixing tree through symbiotic relationship with an actinomycete called Frankia. Common names include coast sheoak, beach casuarina, beach oak, beach sheoak, beach pine, whistling tree, etc.

The correct answer is Only I.

Key Points

• In asexual reproduction, only one parent is involved and sex cells are not involved. 
• It is observed in both multicellular and unicellular organisms.
• Types of asexual reproduction are:
  • Binary Fission
  • Budding
  • Fragmentation
  • Vegetative Propagation
  • Sporogenesis
• Spore formation comes under sporogenesis. Hence, statement 1 is correct.
• Spore formation is a kind of reproduction process in plants by produces tiny spores and propagates through them.
• Spore Formation is a method of asexual reproduction. 
• Spore formation can be seen in the bread mould / Rhizopus.
• The airborne spores land on bread under favourable conditions and they germinate and produce new bread mould plants.
• Each spore is covered with a protective coat to withstand unfavourable conditions.
• Plants like ferns, mucor, and mosses are also reproduced through spore formation
• Spores are present in a sac called sporangia.
• Fragmentation is a type of asexual reproduction. Hence, statement 2 is incorrect.

Additional Information

• Pollination is a method of Sexual Reproduction.
• Self-pollination:
  • The transfer of pollen grains from another to the stigma of the same flower is called self-pollination.
• ​Cross-pollination:
  • The transfer of pollen grains from the anther of one flower to the stigma of another flower is called cross-pollination.
• Vegetative propagation:
  • It is a form of asexual reproduction of a plant wherein a new plant grows from a fragment of the parent plant.

According to the question, we have the following diagram,

Hence, Kritika is standing in the south-west direction with respect to her initial position.