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Answers
Answer:
C. 50%
Explanation:
In a Punnett Square, 2 out of 4 squares show the long hair allele (Ll).
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To function on their own, unicellular organisms must do whatA. Maintain Health OnlyB. Get Energy, Maintain Health, and ReproduceC. Select a Habitat, Maintain Health, ReproduceD. Reproduce and Maintain Health Only
Low sample size can affect the results of a scientific experiment because it may notgive an accurate picture of what would occur in the natural world.TrueFalse
What is the composition of the most abundant mineral compounds on earth?A) Oxalates, oxygen, and one or more organic compounds B) Oxygen, sulfates, and one or more nonmetals C) Carbonates, oxyen, and one or more organic compounds D) Silicon, oxygen, and one or more metals
decline in plant and animal populations
B.
overgrowth of reeds and cattails
C.
pollution of nearby streams
D.
increased frequency of floods
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Answer:
The correct answer is option B, overgrowth of reeds and cattails
Explanation:
Wetlands damage causes damage in vegetation and thus there are least chances that there can be overgrowth of reeds and cattails. Vegetation gets destroyed in a damaged wetlands due to the following reasons –
a) Deposition of excessive pollutants from ruff off, flowing surface water etc.
b) The wetland might have damaged due to overgrazing
c) Shift in river course
d) Hurricanes, storms, strong winds
Answers
Explanation:
Asexual reproduction occurs by cell division during mitosis to produce two or more genetically identical offspring. Sexual reproduction occurs by the release of haploid gametes (e.g., sperm and egg cells) that fuse to produce a zygote with genetic characteristics contributed by both of the parent organisms.
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This property of a metal means that it will react with the amine groups of enzymes or protein found in bacteria, and kill them.
Most heavy metals exhibit this antiseptic ability.
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There are three parts of cellular respiration:
Glycolysis, which produces 2 ATP.
Krebs cycle, which does not produce any ATP. It produces only the raw materials for ATP production.
Oxidative phosphorylation, which involves the electron transport chain that produces maximum ATP. It takes one NADH molecule via Channel 1 to produce 2.5 ATP and one FADH2 molecule via channel 2 to produce 1.5 ATP, for a total of 34 ATP.
Answers
The MC1R gene gives directions for producing a protein known as the melanocortin 1 receptor. This receptor performs an essential function in normal pigmentation. The receptor is mainly situated on the melanocytes surface that are unique cells, which generate a pigment known as melanin.
Melanin is generated by the melanocytes located in the basal layer of the epidermis. The MC1R monitors the production of both pheomelanin and eumelanin.
Final answer:
The MC1R gene most prevalent among people of African ancestry produces eumelanin, a type of melanin. This melanin is responsible for their darker skin pigmentation, especially with UV exposure which stimulates melanocyte's production of more melanin.
Explanation:
The type of melanin produced by the version of the MC1R gene most prevalent among people of African ancestry is eumelanin. Melanin occurs in two forms: eumelanin which is black or brown and pheomelanin which provides a red color. People of African ancestry produce more melanin, specifically eumelanin, which provides a darker pigmentation. The MC1R gene plays an essential role in the synthesis of melanosomes, causing skin pigmentation.
For instance, when skin is exposed to the Ultraviolet (UV) rays from the sun, the UV rays stimulate keratinocytes to secrete chemicals which in turn stimulate melanocytes. The melanocytes increase the production of melanin which results in the darkening of the skin, also known as sun tan.
Learn more about Eumelanin production here:
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