Phospholipids. Phospholipids, arranged in a bilayer, make up the basic fabric of the plasma membrane. They are well-suited for this role because they are amphipathic, meaning that they have both hydrophilic and hydrophobic regions. Chemical structure of a phospholipid, showing the hydrophilic head and hydrophobic tails ..
Answer: a. sepals, petals and stamen attached below it
Explanation:
A superior ovary is the characteristic feature of the hypogynous flower. In this type of flower all the petals, sepals and stamen are remained attached to the receptacle that lies below the ovary also called as the gynoecium of the flower. All the floral parts grow underneath the ovary from the site where the carpel of the flower actually arises.
Answer:
Option (B).
Explanation:
Genetic diversity may be defined as the number of total genetic characteristics of a species. Genetic diversity helps the population to adapt in the changing environment. Crossing over provides a source of genetic diversity.
Crossing over is the process of exchange of genetic material during the process of meiosis. Thus, crossing over increases the variation of genetic characteristic in the haploid gamete cells.
Thus, the correct answer is option (b).
Sun is the primary source of energy. There exists some loss of energy when the energy transfers through successive trophic levels. ... So the energy would be always decreasing as we go to higher trophic levels, it can never d ecrease. Therefore, we cannot have an inverted pyramid of energy.
