Stage 1 which is the high fluctuating stage has both high birth rates and high death rates.
<h3>What is Famine?</h3>
This is a condition which is characterized by lack of food as a result of some factors such as war, natural disaster etc.
In the stage 1, the population growth is slow and fluctuating as a result of high incidences of disease and famine.
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Nucleotides in general has three components. First is the phosphate group that acts as a backbone for the final nucleic acid formed. Second is the pentose sugar which is a 5 carbon sugar; in DNA the sugar is deoxyribose and in RNA the sugar is ribose. Third is the nitrogenous base; it can either be adenine, guanine, cytosine, thymine (in DNA) or uracil (in RNA).
<u>W</u><u>hy does facilitated diffusion happen</u><u>:</u>
<em>~</em><em> </em><em>I</em><em>t regulates what goes in and what goes out of the cell</em>
<em> </em><em>~</em><em>T</em><em>he cell membrane is permeable to only a select few types of molecules</em><em> </em><em>and</em><em> </em><em>t</em><em>h</em><em>e molecules that are allowed to move across the cell membrane must be non-polar molecules which are small in size</em>
<u>W</u><u>hat direction the particles diffuse in</u><u>:</u>
<em>~</em><em>F</em><em>rom one side of the membrane where the substrate concentration is high to the other side of the membrane where the concentration is lower</em>
<em>~</em><em>D</em><em>iffuses across membranes down the concentration gradient</em>
<u>T</u><u>he molecules that help in this process</u><u>:</u>
<em>~</em><em>carbohydrates, amino acids, nucleosides, and ions</em>
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Those who can’t compete die or don’t have a chance to reproduce and pass on their traits (survival of the fittest). To survive and compete, an organism has to adapt to its environment
Answer:
The answer is C. External fertilization doesn't require sexual intercourse.
Explanation:
Fertilization is the process by which haploid gametes, sperm and egg, unite to produce a genetically distinct individual.
Fertilization in most of the animals is similar to that in humans. Animals also produce gametes for fusion. But the fusion of gametes may take place inside or outside the body. Based on this, fertilization is of two types – internal and external fertilization.
Internal fertilization
In sexual reproduction, the male inserts the sperms into the female reproductive tract to fuse with the egg. If the fusion takes place within the female parent, it is called internal fertilization.
External fertilization
When the fusion of sperm and egg takes place outside the female parent, it is called external fertilization. Only a minority of organisms exhibit this type of gamete fusion. For example, fish, frogs, etc. Here the female parent deposits her eggs in a place and later, the male parent ejects his sperms over them, then fusion takes place.
Gametes that fuse externally has to face many challenges. Since eggs and sperms are deposited in the external environment, the chances of fusion are very less. Predators may eat eggs and the zygote that is formed. To compensate this loss, organisms like fish and frogs lay hundreds of eggs at a time.