The structural feature of a spermatozoon containing mitochondria arranged in a spiral around the microtubules is the sperm neck. The spermatozoon functions to carry genetic material from the body of a male. It consists of two major parts which are the head and the tail. It is in the tail that the neck is found. This part is a constricted and a short segment. At least two mitochondria can be found in this portion.
Answer:Human population growth impacts the Earth system in a variety of ways, including: Increasing the extraction of resources from the environment. These resources include fossil fuels (oil, gas, and coal), minerals, trees, water, and wildlife, especially in the oceans.
Explanation:
Answer:
Gamete
Explanation:
Gametes are haploid - so their nucleus only contains a single set of unpaired chromosomes.
<span>Grains, beans, nuts and seeds are all seeds. Rich in complex carbohydrates and fiber, they form the base of most healthy food pyramids. Yet grind grain into flour and suddenly you have a dangerous powder called “refined flour” that is supposed to be avoided like the plague. Gluten intolerance, soy, corn, and peanut allergies are on the rise.
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Answer: Option A.
Sympatric speciation
Explanation:
Sympatric speciation is a reproductive isolation or evolution of groups of species from the main population in the same geographical location.
The fruit flies changes their host plant to another due to specific characteristics posses by the choice host plant. It is a sympatric speciation because they occur in the same geographical location.
