This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 8301. |
Question : Show diagrammatically the stages of embryonic development from zygote upto implantation in humans. |
Answer» Solution :The attachment of fertilized EGG to the uterine wall of mother in placental animal is known as implantation. a. Ovum b. The haploid nucleus of the sperm and that of the ovum fuse together to form a diploid zygote. c. d, e and f - Are the STRUCTURES formed by cleavage. In the 16 celled STAGE, the structure is called MORULA. FINALLY the morula develops a cavity. In this stage, the structure is called blastocyst. It has an outer layer called trophoblast and inner group of cells called inner cell mass. The blastocyst becomes embedded in the endometrium of the uterus. This is called implantation and it leads to pregnancy. |
|
| 8302. |
Question : Show a diagrammatic representation of the mature embryo sac. |
Answer» SOLUTION : .
|
|
| 8303. |
Question : Short twisted strands of hyphae which serves as anchors for lichens |
|
Answer» mycelium |
|
| 8304. |
Question : Shortest phase in the menstrual cycle of women is |
|
Answer» MENSTRUAL phase |
|
| 8305. |
Question : Short pieces of DNA synthesized on the lagging strand ______ |
| Answer» SOLUTION :OKAZAKI FRAGMENTS | |
| 8306. |
Question : Short lived immunity acquired from mother to foetusacross placenta mother's milk to the infant is categorized as |
|
Answer» ACTIVE immunity |
|
| 8307. |
Question : Short - lived immunity acquired from mother to foetus across placenta or through mother's milk to infants is categorised as : |
|
Answer» ACTIVE IMMUNITY |
|
| 8308. |
Question : short lived immunity acquired from mother to foetus across placenta or through mother's milk to the infant is: |
|
Answer» active IMMUNITY |
|
| 8309. |
Question : Short DNA molecules with known base sequences used for recognition of restriction fragments are called ___________. |
|
Answer» |
|
| 8310. |
Question : Shoot meristem tip culture is used to obtain virus-free plants because |
|
Answer» shoot tip is got EASILY |
|
| 8311. |
Question : Short discontinous segment of DNA formed during replication. |
|
Answer» |
|
| 8312. |
Question : Short day plants required: |
|
Answer» LIGHT |
|
| 8313. |
Question : Shoot apex forms lateral branches of stem, leaves and (a) Is unidirectional in activity (b) Is present just above youngest leaf primordia (c ) Does not show plastochron periodicity (d) Shows subterminal position |
|
Answer» (a) and (b) are correct |
|
| 8314. |
Question : Shod distance transport of substances occur by! through |
|
Answer» Diffusion |
|
| 8315. |
Question : Shock organ of allergy is |
|
Answer» Spleen |
|
| 8316. |
Question : The movement in touch-me-not plant induced by touch is: |
|
Answer» Thermonasty |
|
| 8317. |
Question : Sheep and goats differ in their |
| Answer» Answer :D | |
| 8318. |
Question : Sheathing leaf bases is found in :- |
|
Answer» MONOCOT plants |
|
| 8319. |
Question : Sharpey's fibres, are composed of |
|
Answer» Collagen |
|
| 8320. |
Question : Sharbati Sonora' is a: |
|
Answer» Lerma Rojo-64 |
|
| 8321. |
Question : Sharbati sonora' is a high yielding variety of wheat produced by treating sonora 64 Gamma rays. a. How can we make a new variety by treating it with gamma rays? b. Name this method of plant breeding. .c. Give names of other substances that can be used for this type of c. What are they generally called? |
|
Answer» SOLUTION :a. Now a days plants breeders CHANGE the genotype and PHENOTYPE of the plants according to their desire. This type of mutation for the production of new superior varities is known as mutation breeding. e.g. Sharbati Sonara (wheat)- GAMA RAY mutant of Sonara 64. b. mutation breeding c. Chemical mutagens and physical mytagens d. Mutagens |
|
| 8322. |
Question : Sharbati sonora is a mutant got by using_________ |
|
Answer» Thermal NEUTRONS |
|
| 8323. |
Question : Sharbati Sonara is a mutant variety of ………………. . |
|
Answer» Potato |
|
| 8324. |
Question : Shape, size, cell elongation, ability of roots piercing through hard floors is all due to |
|
Answer» Plasmolysis |
|
| 8325. |
Question : Shape of pyramid in a particular ecosystem is always different in shape. Explain with example. |
| Answer» Solution :In a FOREST ecosystem the pyramid of number is spindle in shape, it is because the BASE `(T_1)` of the pyramid occupies large sized trees (Producer) which are lesser in number. Herbivores `(T_2)` (Fruit eating birds, elephant and deer) occupying second TROPHIC level, are more in number than the producers. In final trophic level `(T_4)`, TERTIARY consumers (lion) are lesser in number than the SECONDARY consumer `(T_3)` (fox and snake). | |
| 8326. |
Question : Shape of the chromosome is determined by the position of_____ |
|
Answer» |
|
| 8327. |
Question : Shape of pyramid in a particular ecosystem is always different in shape.Explain with Example. |
| Answer» SOLUTION :In a forest ECOSYSTEM the PYRAMID of number is spindle in shape, it is because the base `(T_1)` of the pyramid occupies large sized trees (Producer) which are lesser in number. Herbivores `(T_2`) (Fruit eating birds, elephant and deer) occupying second trophic LEVEL, are more in number than the producers. In FINAL trophic level `(T_4)`, tertiary consumers (lion) are lesser in number than the secondary consumer `(T_3)` (fox and snake). | |
| 8328. |
Question : Shape of chloroplast of Ulothrix is |
|
Answer» star-shaped |
|
| 8329. |
Question : Shakti, Rattan and Protina are three important lysine rich varieties of |
|
Answer» rice |
|
| 8330. |
Question : Sexually transmitted disease (STD) are mainly transmitted through sexual contact. Name any two example of sexually transmitted disease. |
| Answer» SOLUTION :Gonorrhoea/Syphilis/Genital herpes/Genital warts/Chlamydiasis/Hepatitis-B/AIDS | |
| 8331. |
Question : Sexually transmitted disease (STD) are mainly transmitted through sexual contact. Explain any two methods adopted to present STDs. |
|
Answer» Solution :AVOID sex with unknown/multiple PARTNER Always use condoms during coitus. In case of DOUBT early detection by DOCTOR |
|
| 8332. |
Question :Sexually transmitted diseases (STDs) are those infections and communicable diseases which are transmitted from an infected person to a healthy but susceptible person during unprotected vaginal or anal or oral sexual contact. These are also called silent infections as well as international diseases. These may be bacterial or viral or protozoan or fungal in origin. Out of STDs, chlamydiasis is the most common bacterial STD. A case-controlled study of the prevalence of genital chlamydiasis in a study group of 120 patients with tubal infertility and a control group of another 120 clients following family planning measures. The prevalence was found to 38.3% in the study group while it was found to be 13.3% in the control group. Answer the following questions on STDs: (i) What is causative agent of chlamydiasis? (ii) List the symptoms of it in human female. (iii) What is indicated by the higher prevalence of tubal infertility in the study group than the control group? |
| Answer» Solution : (i) Bacterium-Chlamydia trachomatis (ii) Symptoms in females Inflammation of CERVIX, UTERUS and fallopian TUBES leading to Pelvie INFLAMMATORY Diseases (PID) causing sterility. (iii) Chlamydiasis increases the prevalence of TUBAL infertility | |
| 8333. |
Question : Shade loving plants are |
|
Answer» HELIOPHYTES |
|
| 8334. |
Question : Shade plants have |
|
Answer» More PSII |
|
| 8335. |
Question : Sexually abused children show symptoms of __________. |
| Answer» Answer :A | |
| 8336. |
Question : Sexual reproduction of higher plants include …………….. Stages. |
|
Answer» 2 |
|
| 8337. |
Question : Sexual reproduction is considered more beneficial than asexual reproduction because |
|
Answer» it is not affected by adverse environmetal conditions |
|
| 8338. |
Question : Sexual reproduction involving fusion of two cells in Chlamydomonas is |
|
Answer» isogamy |
|
| 8339. |
Question : Sexual reproduction involves formation of the male and female gametes by |
|
Answer» Same individual |
|
| 8340. |
Question : Sexual reproduction in Spirogyra is an advanced feature because it shows |
|
Answer» physiologically DIFFERENTIATED SEX organs |
|
| 8341. |
Question : Sexual reproduction in Chlamydomonas is 4. |
| Answer» Answer :D | |
| 8342. |
Question : Sexual maturity of House Mouse is attained at the age of |
|
Answer» 35 days |
|
| 8343. |
Question :Sex-linked disease is |
|
Answer» diabetes |
|
| 8344. |
Question : Sex of the baby is determined by the father not by the mother substantiate. |
| Answer» Solution :Sex chromosome of FEMALES are XX. HENCE all the ova carry X chromosome. Males are heterogametic (XY). Hence `50%` sperms carry X chromosome and 50% carry Y chromosome. A male CHILD is developed when a Y-sperm fertilises the ovum and a female child is formed when the X-sperm fertilises the ovum. Therefore, the statement that the sex of the baby is determined by the father and not by the MOTHER is true. | |
| 8345. |
Question : Sex of the offspring depends on the fertilizing ovum in |
|
Answer» FRUIT fly, Butter fly |
|
| 8346. |
Question : Sex -linked chromosomes of man are |
|
Answer» <P>Present on autosomes |
|
| 8347. |
Question : Sex determination is based on particular chromosomes in both birds and humans. State two points of difference between their mechanisms of sex determination. |
|
Answer» Solution :i. In birds female has dissimilar CHROMOSOMES (ZW) and male has two similar ZZ chromosomes. But in HUMANS female has XX (homogametic) and male has XY (heterogametic) II . In humans the sperm is responsible for the sex of child but in birds egg is responsible for the sex of the CHICKS. |
|
| 8348. |
Question : Sex linked characters are always |
|
Answer» A.lethal |
|
| 8349. |
Question : Sex determination is based on particular chromosomes in both birds and humans. State two point of difference between their mechanisms of sex determination. |
Answer» SOLUTION :
|
|