Biology
- Q: Explain The Functions Of Primers In Pcr
Primers mark out a sequence of DNA to amplify. This sequence would be complementary to the target DNA strand which it attaches itself to. They also prevent the single stranded DNA from re-annealling by sticking to a part of the target DNA. They also allow...
- What Is Parthenocarpy?
A) Process of formation of seeds without fertilization.B) Mechanism of transfer of pollen grains from anther to stigma. C) Phenomenon of development of fruits without fertilization.D) Phenomenon of formation of more than one embryo in the seed. The...
- #81 Question 4
The diagrams below show five molecules found in living organisms. (a) Give the letter of one molecule that fits each of these descriptions. You can use each letter once, more than once or not at all. (i) the form in which carbohydrates...
- #77 Questions And Answers
In this section is a practice examination paper, similar to the Cambridge International AS Level Biology paper 2. All of the questions are based on the topic areas described in the previous sections. Youhave 1 hour and 15minutes to do the paper....
- Comparison Between Pollination And Fertilization
Pollination and Fertilization: Major differences Pollination Fertilization 1. It is the transfer of pollen grains from anther to stigma of the flower It is the fusion of male gametes and egg cell in embryo...
Biology
stigma (pl stigmata)
Term: stigma
Origin: Anc Greek ??????/stigma(=mark, fleck, puncture)
>?????/tego(=blotch, spot) originally stigma was a mark or brand on Greek slaves made on skin by burning with a hot iron, distinguishing them from free men.
Definition:
1. (anatomy) a small spot or mark on the of an organ or organism.
2. (botany) is the receptive tip of a carpel (part of the female reproductive part of a flower) which receives pollen at pollination.
3. in the plural stigmata are hemorrhagic lesions of the hands and/or feet, resembling crucifixion wounds.
- Q: Explain The Functions Of Primers In Pcr
Primers mark out a sequence of DNA to amplify. This sequence would be complementary to the target DNA strand which it attaches itself to. They also prevent the single stranded DNA from re-annealling by sticking to a part of the target DNA. They also allow...
- What Is Parthenocarpy?
A) Process of formation of seeds without fertilization.B) Mechanism of transfer of pollen grains from anther to stigma. C) Phenomenon of development of fruits without fertilization.D) Phenomenon of formation of more than one embryo in the seed. The...
- #81 Question 4
The diagrams below show five molecules found in living organisms. (a) Give the letter of one molecule that fits each of these descriptions. You can use each letter once, more than once or not at all. (i) the form in which carbohydrates...
- #77 Questions And Answers
In this section is a practice examination paper, similar to the Cambridge International AS Level Biology paper 2. All of the questions are based on the topic areas described in the previous sections. Youhave 1 hour and 15minutes to do the paper....
- Comparison Between Pollination And Fertilization
Pollination and Fertilization: Major differences Pollination Fertilization 1. It is the transfer of pollen grains from anther to stigma of the flower It is the fusion of male gametes and egg cell in embryo...