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Double fertilization and triple fusion were discovered by

Double fertilization and triple fusion were discovered by Correct Answer Nawaschin and Gruignard

Double fertilization and triple fusion were discovered by Nawaschin and Gruignard.
Double fertilization is a complex fertilization mechanism of flowering plants (angiosperms). This process involves the joining of a female gametophyte with two male gametes (sperm).
It begins when a pollen grain adheres to the stigma of the carpel, the female reproductive structure of a flower. The pollen grain then takes in moisture and begins to germinate, forming a pollen tube that extends down toward the ovary through the style.

Related Questions

Consider the following statements and choose the correct answer:
1. For the development of viable seeds the double fertilization is very necessary
2. The net result of double fertilization is the formation of endosperm from the triploid nucleus
3. In Angiosperms very free nuclear divisions take place as in Gymnosperms
4. The endosperm nucleus has both maternal and paternal characters showing physiological importance like hybrid vigour
Which of the following reasons led to the setting aside of the practice of 'talaqe- biddat', triple talaq in Shayara Bano v. Union of India, (2017) 9 SCC 1?
(1) Section 2 of the Muslim Personal Law (Shariat) Application Act, 1937 was a pre-constitutional legislation within the meaning of Article 13(1) and violative of Article 14 of the Constitution of India on the ground of arbitrariness.
(2) Section 2 of the Muslim Personal Law (Shariat) Application Act, 1937 was a pre-constitutional legislation within the meaning of Article 13(1) and violative of Article 15 of the Constitution of India, being discriminatory.
(3) Muslim Personal Law (Shariat) Application Act, 1937 is not a law regulating triple talaq but the practice of triple talaq was against the basic tenets of the Holy Quran and no practice against the tenets of Quran was permissible.
(4) 'Talaq-e-biddat' is integral to the religious denomination but the Supreme Court may injunct this practice as a means for severing matrimonial relationship.
In a survey of 900 students, 400 students were interviewed in TCS, 310 students were interviewed in IBM and 470 students were interviewed in Infosys. Also, 110 students were interviewed in both TCS and IBM, 80 students were interviewed in both IBM and Infosys and 140 students were interviewed in both TCS and Infosys. If 50 students were interviewed in all three companies. Then, how many students were interviewed in only TCS?
Consider the following statements regarding double fertilization and choose the correct answer:
1. At the time of the sperm's approach to the egg nucleus, the male nucleus has the appearance of a continuous thread rolled into a ball
2. It is only the presence of the two nucleoli which serves to distinguish the fertilized egg from the unfertilized egg
3. Finally, the male nucleolus increases in size and fuses with the female nucleolus thus closing the phenomenon of sexual union of the nuclei
4. The fusion of the male gamete with the secondary nucleus results in the formation of a sister embryo
Double fertilization is fusion of
The question is given below consist of a question followed by three statements labeled as I, II and III. You have to decide whether these statements give enough information required to answer the question or not. Ten people P, Q, R, S, T, U, V, W, X and Y were born on ten different dates 5, 7, 9, 12, 13, 15, 18, 21, 23 and 27 of the same month but not necessarily in the same order. I. Q and T were born on an even numbered date. W was born on 7 and U was born after W. Only five people were born between R and T. Y was born on 23. P is the eldest person. II. V was born on 13 and T on 12. Neither S nor Q was born on 27. Only six people were born between P and X. and P is the eldest person. There are as many people between T and Q as between Q and R. III. P is the eldest and R is the youngest person. Only six people were born between W and Y. If the dates on which T and S were born are added, the resultant will give the date on which X was born. When was X born?
Hotel Aditya has 10 single AC rooms, 5 double AC rooms and 18 non AC rooms. The fixed monthly rent of hotel is 150,000. The per day maintenance cost is Rs. 100 for double AC room, Rs. 75 for single AC room and Rs. 40 for non AC room. The per day charges are Rs. 600 for double AC room, Rs. 400 for single AC room and Rs. 250 for non AC room. In April 2003, the occupancy rate of non AC room was 50%, 70% of single AC room and 40% of double AC rooms. Find the profit/loss % for that particular month.
Consider the following statements regarding the embryological evidences for evolution and choose the correct answer:
1. Algae are much advanced than mosses and ferns
2. Protonema of mosses resemble certain green algae
3. Both bryophytes and pteridophytes have ciliated sperms and require water for fertilization
4. Gymnosperms do not need water for fertilization
5. Cycads and Gingko, the primitive gymnosperms, have ciliated sperms like the pteridophytes
Consider a fully-associative data cache with 32 blocks of 64 bytes each. The cache uses LRU (Least Recently Used) replacement. Consider the following C code to sum together all of the elements of a 64 by 64 two-dimensional array of 64-bit double-precision floating point numbers. double sum (double A [64] [64] ) { int i, j ; double sum = 0 ; for (i = 0 ; i < 64; i++) for (j = 0; j < 64; j++) sum += A [i] [j] ; return sum ; } Assume all blocks in the cache are initially invalid. How many cache misses will result from the code?
Consider the following statements regarding sporogenesis and choose the correct answer:
1. Gametes ape always unicellular and microscopic in size
2. The union of similar gametes is called fertilization
3. The zygote formed as a result of fertilization is called zygospore
4. The seed on germination gives rise to a new plant