How flowers can be differentiated?
Flower differentiation is a plant process by which the shoot apical meristem changes its anatomy to generate a flower or inflorescence in lieu of other structures.
Which gene gets expressed during the development of first whorl in the flower formation?
In the first floral whorl only A-genes are expressed, leading to the formation of sepals. In the second whorl both A- and B-genes are expressed, leading to the formation of petals. In the third whorl, B and C genes interact to form stamens and in the center of the flower C-genes alone give rise to carpels.
Why are phospholipids amphipathic molecules?
Phospholipids are amphipathic because they have hydrophobic tails and hydrophilic heads. The tails of the phospholipid are made of fatty acid chains. This part of the molecule is hydrophobic and faces inward in the cell membrane to avoid contact with water.
What is unisexual flower?
UNISEXUAL FLOWERS: A flower that possesses either stamens or carpels but not both are called unisexual flowers. Examples include coconut flowers, papaya, watermelon etc. BISEXUALFLOWERS: A flower that possesses both stamens and carpels. Examples include lily, rose, sunflower etc.
What are Zygomorphic flowers?
Zygomorphic flowers are the flowers which can be divided into two equal halves by only one vertical division. These flowers have bilateral symmetry. Datura, mustard and tomato have actinomorphic flowers. So, the correct answer is ‘Gulmohur’
What is ABC model in plants?
The ABC model of flower development is a scientific model of the process by which flowering plants produce a pattern of gene expression in meristems that leads to the appearance of an organ oriented towards sexual reproduction, a flower.
What is amphipathic lipid?
All of the lipid molecules in cell membranes are amphipathic (or amphiphilic)—that is, they have a hydrophilic (“water-loving”) or polar end and a hydrophobic (“water-fearing”) or nonpolar end. The most abundant membrane lipids are the phospholipids. These have a polar head group and two hydrophobic hydrocarbon tails.
What are floral homeotic genes?
Introduction. The simple and elegant ABCE model for flower development ,  gave specific predictions about where the A, B, C, and E genes, also referred to as “floral homeotic genes”, are active within a flower that consists of four concentric whorls of floral organs.
What are the homeotic genes of floral organ identity?
The ABCDE model for flower development proposes that floral organ identity is defined by five classes of homeotic genes, named A, B, C, D and E .
What are Monoecious flowers?
Monoecious plants have both male and female reproductive parts in the same plant. E.g. cucurbits and coconuts. Monoecious plants produce both male and female gametes. The male part is called androecium, which consists of stamens and the female part is called gynoecium, which consists of the pistil.
Is rose unisexual flower?
Explanation: Unisexual flowers are the one in which either the stamens or the carpel are missing or non functional. The flower in which both stamens and the carpel is present is called bisexual flower. Petunia and Rose are bisexual flowers whereas Corn is unisexual.
What is asymmetric flower?
When the flower cannot be divided into two equal halves in any plane, it is called an asymmetrical flower.
What is floral meristem?
Floral meristems produce flowers that usually consist of four whorls of organs. After producing these whorls, the activity of the floral meristem ceases, unlike the SAM, which continuously proliferates and produces organ primordia from its flanks.
What is AG gene?
AGAMOUS (AG) is a C-function floral organ identity gene, and is responsible for formation of stamens and carpels in the third and fourth whorls of the wild type flower.
What is a Zygomorphic flower?
Definition of zygomorphic of a flower. : having floral parts unequal in size or form so that the flower is capable of division into essentially symmetrical halves by only one longitudinal plane passing through the axis.
What do you mean by amphipathic?
1 Amphipathic Definition. An amphipathic molecule is a molecule that has both polar and non-polar parts. 2 Function of Amphipathic Molecules. Probably the most important function of amphipathic molecules in biology is in the formation of the cell membrane. 3 Examples of Amphipathic Molecules. 4 Related Biology Terms. 5 Quiz.
Why are amphipathic molecules biologically useful?
Amphipathic molecules are biologically useful because they can interact with both polar and non-polar substances. This allows them to make things possible that would not be possible with polar and non-polar molecules alone, including the creation of such crucial structures as the cell membrane.
How do amphipathic molecules form membranes?
Amphipathic molecules accomplish this remarkable feat in a deceptively simple way. Phospholipids – the type of amphipathic molecule that makes up most cell membranes – are able to form a stable membrane because their “ head ” is attracted to water molecules, while their “tails” are repelled by them.
What are amphipathic molecules in soap?
Amphipathic molecules allow detergents, soaps, shampoos, and many other cleaning products to carry away substances that don’t wash away with water alone. Soaps are traditionally made by treating fatty substances, such as vegetable oils or animal fat, with a chemical called lye.