In a hen house, the length of daylight is prolonged by using indoor lighting. the stimulus for egg laying is
(a) food
(b) warmth
(c) light
(d) amount of water.
The correct answer is option (c) light.
Light is found to have a significant effect on egg laying by hens in the hen houses or poultry. Photoperiod is the length of the time within a day to which the hens are exposed to sunlight or artificial source of light. Egg production is reduced if the light intensity and duration is reduced. A peak production of hens is observed with the photoperiod is lengthened or a longer photoperiod.
Natural day light exposure to hens results in the production of not more than 40 eggs. Whereas, a prolonged day light of 12- 14 hours by indoor lighting increases the number of eggs layed to around 60 eggs. Thus, the stimulus for egg laying is the light.
Thus, In a hen house, if the length of daylight is prolonged by using indoor lighting, the stimulus for egg laying is light.
The 31 spinal nerve pairs are organized geographically by spinal region. There are eight pairs of cervical nerves (C1-C8), twelve pairs of thoracic nerves (T1-T12), five pairs of lumbar nerves (L1-L5), five pairs of sacral (S1-S5), and one pair of coccygeal nerves.
<h3>What number of nerves make up a pair?</h3>
The cranial nerves, a collection of 12 paired nerves, are located at the back of your brain. Your cranial nerves transmit electrical signals to your brain, face, neck, and body.
<h3>What are the 31 pairs of spinal nerves used for?</h3>
The peripheral nervous system, which consists of 12 cranial nerves and 31 pairs of spinal nerves, transmits nerve impulses from the central nervous system (CNS) to the rest of the body to control bodily activities.
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Binary Fission is a form of Asexual Reproduction.
Answer:
The correct answer would be (c)[m phase].
M phase or mitotic phase is the phase of the cell cycle in which the actual division of chromosomes (karyokinesis) into two daughter nuclei takes place.
It can be divided into four stages namely prophase, metaphase, anaphase, and telophase.
During anaphase, the sister chromatids of each replicated chromosomes are separated from each other and are pulled in opposite side with the help of mitotic spindle.
Then during telophase (last stage of M phase), the separated chromosomes reach either pole of a dividing cell. In addition, nuclear membranes are reformed around each chromosome set which forms the two daughter nuclei.
M phase is followed by cytokinesis which divides the cytoplasm, cell organelles, cell membrane, and two daughter nuclei into two daughter cells.
Note: Chromosome duplication or replication takes place in S phase while the division of the replicated chromosomes takes place in M phase.
Answer:
The main difference between chromatin and chromosome is that chromatin consists of the unravelled condensed structure of DNA for the purpose of packaging into the nucleus whereas chromosome consists of the highest condensed structure of the DNA doublehelix for the proper separation of the genetic material between
