Answer: A) Yes Explanation: Yes, plant cells have Mitochondria. While plant cells have chloroplasts to photosynthesize, they also require ATP for cellular functions, and do use oxygen to break down some of the sugar they produce in order to generate that ATP. They need mitochondria for this. In particular, at night when there is no light, plants undergo cellular respiration since there is no sunlight to photosynthesize. They do, however, produce far more sugar and oxygen through photosynthesis than they use up in respiration.

Answer: D) It consists of separate tables or related data Explanation: A relational database is a digital database based on the relational model of data, a database structured to recognize relations between stored items of information. A software system used to maintain relational databases is a relational database management system.   Computer database in which all data is stored in Relations which (to the user) are tables with rows and columns. Each table is composed of records (called Tuples) and each record is identified by a field (attribute) containing a unique value. Every table shares at least one field with another table in 'one to one,' 'one to many,' or 'many to many' relationships. These relationships allow the database user to access the data in almost an unlimited number of ways, and to combine the tables as building blocks to create complex and very large databases.

Answer: D) Cosmology Explanation: Cosmology is the scientific study of the large scale properties of the universe as a whole. It endeavors to use the scientific method to understand the origin, evolution and ultimate fate of the entire Universe. Depending on the outcome of the observations, the theories will need to be abandoned, revised or extended to accommodate the data. The prevailing theory about the origin and evolution of our Universe is the so-called Big Bang theory.

Answer: A) 8, 72 yrs Explanation: Let the present ages be K,M Given K/M = 4/5 5K - 4M = 0 ......(1) Also given that, M - (K + 5) = 3 M - K = 8 .........(2) Then, by solving (1) & (2) M = 40 yrs and K = 32 yrs Hence, Total of ages = 40 + 32 = 72 yrs Difference of ages = 40 - 32 = 8 yrs.

Matching blood group before marriage is important. This is to prevent Rh incompatibility. Rh incompatibility can lead to erythroblastosis fetalis (Hemolytic disease of the newborn-HDN). Fetal RBC gets destroyed & newborn may get severe anaemia, jaundice. This jaundice is more severe than Physiological jaundice ( which is the most common and will usually resolve on its own).   In very severe form, a fetus may die due to heart failure. This is mediated by the antigen-antibodies reaction. Transfer of maternal antibodies across the placenta occurs. This happens when Rh +ve man marries Rh-ve lady.    So Rh +ve man should try to avoid marrying Rh-ve lady.   Matching blood groups for marriage :: Boy : A = Girl : A & AB  Boy : B = Girl : B & AB  Boy : O = Girl : O, A, B & AB  Boy : AB = Girl : AB  Boy : Rh+ve = Girl : Rh+ve  Boy : Rh-ve = Girl : Rh+ve & Rh-ve.    Blood groups that do not match for marriage :: Boy : A = Girl : O & B  Boy : B = Girl : O & A  Boy : AB = Girl : O, A & B  Boy : Rh+ve = Girl : Rh-ve.

Answer: B) Voltage Explanation: Electrical Pressure is also called as Voltage. Voltage is measured in Volts.   Volt : A unit of electrical pressure or Voltage is called Volt.   One volt is the amount of pressure required to cause one ampere of current to flow against one ohm of resistance.   Voltage is also referred to as Electromotive Force or Electrical Potential or Electrical Pressure.

Answer: D) Chandragupta Vikramaditya Explanation: Fahien came to India during the reign of Chandragupta Vikramaditya.

Answer: D) Haryana Explanation: The Bhindawas Bird Sanctuary (BBS) is located in Jhajjar district, Haryana. It is home to many birds such as Blue Peafowl, Gray Francolin, Black Francolin, Shikra, Black Kite, Greater Coucal, White-throated Kingfisher, Coppersmith Barbet and Indian Roller. It is in news because the sanctuary will soon be developed as a beautiful tourist resort and the additional facilities to be provided to the tourists coming to this place would include arrangements for camping for night stay, beautification of the lake, and opening of dispensary for birds and the wild life.