Science
- What will bethesame of magnesium chloride?
- Take 5 examples from your surroundings and give explanation based on Newton's law of motion 1) When a ball is kicked in space, the ball keeps moving in one direction as there is no gravity. The ball stops when it hits an object or p... 1
- Explain tha disorders -Abinism Answer: Albinism is a hereditary (genetic) disorder in which the body cannot produce the pigment melanin, so the skin, hair and eyes lack no... 1
- Slim person feel more cold in winter the fat persons. Answer: Fat persons have a thicker layer of fat (adipose tissue) under the skin, which acts as an insulator and reduces heat loss. Slim pers... 1
- Inner surface of mouth Answer: Squamous epithelium (stratified squamous epithelium) The inner surface (lining) of the mouth is covered by squamous epithelial tissu... 1
- Tissue joining two bones Answer: Ligament A ligament is a connective tissue that joins one bone to another bone at a joint. It is made mostly of strong collagen fibr... 1
- Write the differences. Simple tissue and complex tissues in plants. Simple Tissue in plants Complex Tissues in plants (i) They are made up of only one type of cells. (i) They are made up of more than one type... 1
- Write the names of the following tissues. a. Tissue lining inner surface of mouth. b. Tissue joining muscles and bone a. Tissue lining inner surface of mouth. Answer: Squamous epithelium. b. Tissue joining muscles and bones. Answer: Tendon c. Tissue responsi... 1
- Identify the odd word and explain why it is odd. c. Cartilage, bone, tendon, cardiac muscle. Cardiac muscle is the odd one out because rest of the three are connective tissues while cardiac muscle is a type of muscular tissue. 1
- Identify the odd word and explain why it is odd. b. Epithelium, Muscle fibre, nerve fibre, epidermis. Epidermis is the odd one out because all the other are Permanent tissues. Epidermis is an outer layer of cells found in plants. 2
- Identify the odd word and explain why it is odd. a.Xylem, phloem, permanent tissue, meristematic tissue. Meristematic tissue is the odd one out because xylem and phloem are types of permanent tissues. 1
- Each of the following statements is wrong. Rewrite them correctly by changing either one or two words. a. Ciliated epithelium is present in respiratory tract. b. Cuboidal epithelium is present in kidneys. c. Aerenchyma helps the plant to float... 2
- Why it is necessary for people to have their blood examined before their marriage? It is necessary for people to have their blood examined before their marriage because genetic disorders are mainly transmitted through the r... 2
- Explain the structure, function and types of RNA. Answer: RNA (ribonucleic acid) is usually a single-stranded nucleic acid made of ribonucleotides; its main job is protein synthesis. Its thr... 1
- Explain your opinion about the DNA fingerprinting. DNA fingerprinting is the technique in which the sequence of the genes in the DNA of a person, i.e., the genome of the person is identified.... 1
- Describe the structure of DNA molecule. Answer: DNA is a double helix made of two long strands of nucleotides, twisted around each other like a spiral ladder (Watson and Crick mode... 1
- What is mean by chromosome? Explain its types. The structure in the nucleus of cells which carries hereditary characteristics is called as chromosome which is mainly made up of nucleic ac... 1
- Is it right to avoid living with a person suffering from a genetic disorder? No, it is not right to avoid living with a person suffering from a genetic disorder. Genetic disorders are transmitted from parents to offsp... 1
- Distinguish between monohybrid and dihybrid cross. Monohybrid cross Dihybrid cross (i) Cross involving a single pair of contrasting characters is called monohybrid cross. (i) Cross involving... 1
- Explain Mendel’s dihybrid ratio with any one of the cross. Answer: In a dihybrid cross, the F2 generation shows the phenotypic ratio 9 : 3 : 3 : 1. A dihybrid cross studies two pairs of contrasting c... 1
- a) Explain Mendel’s monohybrid progeny with the help of any one cross. Answer: In a monohybrid cross between pure tall (TT) and pure dwarf (tt) pea plants, all F1 plants are tall, and the F2 generation shows tal... 1
- Complete the following sentences by choosing the appropriate words from the brackets. a) Hereditary characters are transferred from parents to offspring’s by gene hence they are said to be structural and functional units of he... 1
- Explain co-ordination in plants with the help of suitable examples. Answer: Plants have no nervous system; they co-ordinate their responses through plant hormones (phytohormones) and through movements in resp... 1
- Explain the difference between the excretory system of humans and plants. Excretory system of humans excretory system of Plants 1. The excretory products of humans are toxic. They are harmful if stored in the body.... 1