<h2>
Reproductive Method </h2>
Explanation:
<em>The rank in order from the most specific which is following .</em>
<em>(1) Reproductive isolating mechanism</em>
<em>(2) Sperm-egg incompatibility in sea urchins</em>
<em>(3) Gametic isolation </em>
<em>(4)Prezygotic isolating mechanism</em>
<em>(1) Reproductive isolating mechanism-</em> The components of regenerative confinement are an assortment of transformative instruments, practices and <em>physiological procedures basic for speciation.</em> They keep individuals from various species from delivering posterity, or guarantee that any posterity are sterile.
(<em>2) Sperm-egg contradiction in ocean urchins-</em> Bindin is a gamete acknowledgment protein known to control species-explicit <em>sperm-egg grip</em> and layer combination in ocean urchins.
<em>
(3)Gametic isolation - Prezygotic hindrances </em>keep preparation from occurring. Gametic disengagement is a sort of prezygotic hindrance where the<em> gametes (egg and sperm) </em>come into contact, yet no preparation happens. Gametes might be not able to remember each other in various species
<em>
(4) Prezygotic isolating mechanism- </em>while postzygotic segregation forestalls the arrangement of rich posterity. Prezygotic systems incorporate environment segregation, mating seasons, "mechanical" disconnection, gamete detachment and conduct seclusion.
<h2><u><em>
Which graph represents selection that may lead to reduced variation in a population?
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mc015-1. jpg
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mc015-2. jpg
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mc015-3. jpg
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mc015-4. jpg</em></u></h2><h2><u><em>
</em></u></h2><h2><u><em>
C
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</em></u></h2>
Answer: Option C is false.
Archaea are not multicellular but they are unicellular.
Explanation:
Archaea are unicellular, microscopic organisms and have similar structure with bacteria.
They are prokaryotes and do not have cell organelles and Nucleus but they have cell wall which lack peptidoglylcan.
They have membranes that enclose lipids. They are obligated anaerobes that live in environment with low oxygen like water and soil.
Examples include methane loving methanogens, halophiles( salt tolerant), thermophiles (heat tolerant ) and pschrophiles ( cold dwelling). They are mostly found in extreme environment.
