Answer:
The leafhoppers eat plant tissues and, at the same time, they are eaten by spiders that are the food of large lizards. Finally, these lizards are the food of birds that are eaten by snakes.
Explanation:
The food chain starts with primary producers such as plants and algae (i.e., level 1), then goes through herbivorous species including insects and fish (level 2) and finally ends with carnivores such as rodents, snakes and hedgehogs (levels 3, 4 and sometimes 5, which depends on presence of larger predators). Thus, the trophic levels are represented by the number of steps of the food chain. In an ecosystem, the organisms can also be classified according to the mode of obtaining the food in producers (autotrophs), consumers (heterotrophs) and reducers (detritivores).
The option are not given and the options are:
Proteins are denatured by breaking covalent bonds.
Linear molecules like DNA are inherently stable.
Individual hydrogen bonds may be weak, but DNA structure is stabilized by many thousands or millions of these bonds - far more than found in proteins.
The statement is incorrect; it actually takes far more energy to denature proteins than it does to denature DNA.
Answer:
The correct answer is- Individual hydrogen bonds may be weak, but DNA structure is stabilized by many thousands or millions of these bonds - far more than found in proteins.
Explanation:
Proteins become denatured when it looses its three-dimensional structure. Disulfide bond and hydrogen helps in stabilizing the three-dimensional structure of proteins and if these bonds break due to any factor protein lost its structure and function.
DNA is made up of a large amount of hydrogen bond because in AT base-pairing two hydrogen bonds are required and in GC base pairing three hydrogen bonds are required. Therefore it can be concluded that as more hydrogen bonds stabilizes DNA than protein its melting temperature is higher than protein.
Answer:
d. the groups will probably diverge genetically, and speciation may occur
Explanation:
The geographical isolation of two populations of a species for a longer time period leads to allopatric speciation. During the process, the isolated populations accumulate genetic variations to become adapted to the prevailing conditions of the habitat.
Accumulation of genetic variations leads to reproductive isolation between the population. After several generations, the individuals of the two isolated populations are unable to interbreed due to genetic variations. Now, these two populations are said to belong to two different species. The isolated lizard populations would also accumulate genetic variations resulting in allopatric speciation.
Answer:
Tommy John surgery repair the ulnar collateral ligament.
Explanation:
Tommy John surgery is the reconstruction of a torn ulnar collateral ligament which is located on the inner side the elbow that holds or support the elbow joint. The purpose of the surgery is to eliminate pain and stabilize the elbow and restore the range of motion. This surgery is often given to players that excessively uses the elbow and the first to undergo this procedure was Tommy John, a baseball pitcher in 1974.
Answer:
II. meiosis
III. fertilization
IV. gametes
Explanation:
Gamete formation and fertilization are the processes performed by all the sexually reproducing organisms. Gametes are the cells that are formed in the male and female sexual organs of these organisms. Formation of gametes occurs by meiosis and therefore, the gametes of a diploid organism are always haploid.
Male and female gametes fuse during the process of fertilization and form the zygote which in turn divide repeatedly to produce an embryo. For instance, sperms and eggs are the male and female gametes that are formed in testes and ovaries of male and female human individuals respectively. The fusion of sperm and egg produces a zygote that finally develops into a young one.