The syrinx. It is an organ found in almost all song birds.
<u>Answer</u>:
The parasite which do all stages of the life cycle (including the hatching of its eggs) occur on the hide of the host animal is (C) Lice.
<u>Explanation</u>:
There are three stages of a lifecycle of a lice: 'egg', 'nymph' and 'adult'. Nits are lice eggs on the head which are confused with dandruff. Egg hatches in around 1 week and release into a nymph. They mature into an adult in 7 days. Adult louse have six legs and can be greyish white in color. They feed on human blood many times in a day. `
For other options like round worms and hookworms, hookworm release eggs and they are released in stool of the dog after few days. This gets mixed in soil and can be consumed by humans as well by exposure. So, these are incorrect options and correct option is lice.
Answer:
Crossing over is the process of interchange of genetic information among non-sister chromatids of homologous chromosome pairs during meiosis (specifically during synapsis in prophase I). During this process, the synaptonemal complex enables the interchange of chromosome fragments between non-sister chromatids through crossing over. Moreover, in sexual reproduction, the zygote diploid cell can be generated by the random joining of fully differentiated haploid gametic cells (male and female gametes). The combination of random joining with the phenomenon of crossing over is known to considerably increase the genetic variation of the resulting offspring. After zygote formation, the successive cycles of cell divisions during embryonic development will develop an organism that during its adult stage will reproduce via sexual reproduction.
It's a heart disease that's all I know
B or D I remember learning this but I don't recall which exact one it could be but hope this helped a little bit.
