The part of the nervous system that controls voluntary activities is the
1 answer:
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Answer:
Biotic factors include: Fish (phytoplankton-eater, zooplankton-eater, predator)
, Crayfish
, Zooplankton
, Grasses, phytoplankton, herbivorous insect, worms, etc.
Abiotic factors include: Sunlight, Rainfall, Sedimentation, Weather, Minerals, Temperature.
Changes that would impact the biotic factors include:
Water, air pollution
Human activities: such as overfishing, rechanneling of the water for purposes such as irrigation, domestic or industrial use, or dredging of the bottom of the lake.
Explanation:
An ecosystem is composed of biotic and abiotic factors. Abiotic factors are non-living environmental factors such as water, air, soil, sunlight, and minerals. In aquatic ecosystems, abiotic factors include substrate type, water depth, nutrient levels, temperature, salinity, and waterflow. Biotic factors are the living organisms in the ecosystem and they include animals, birds, plants, fungi, etc.
In the image of the freshwater lake ecosystem given,
Biotic factors include: Fish (phytoplankton-eater, zooplankton-eater, predator)
, Crayfish
, Zooplankton
, Grasses, phytoplankton, herbivorous insect, worms.
Abiotic factors include: Sunlight, Rainfall, Sedimentation, Weather, Minerals, Temperature.
Changes that would impact the biotic factors include:
Pollution: pollution such as water pollution and air pollution will adversely impact the biotic factors.
Human activities: such as overfishing, rechanneling of the water for purposes such as irrigation, domestic or industrial use, or dredging of the bottom of the lake.
Answer: The genotype ratio is 2Ff : 2ff
The phenotype ratio is two normal feathered birds to two silky feathered birds.
Explanation: Let F represent the gene for normal feather and f represent the gene for silky feather. F is dominant while f is recessive, therefore a male that is hybrid for trait of normal feather is heterozygous and will have a genotype of Ff, a female that is homozygous for silky feather will have a genotype of ff.
A cross between Ff and ff will yield 2Ff birds and 2ff birds. Since F is dominant, a bird having genotype of Ff will manifest outwardly as blue feathered birds while ff will manifest outwardly as silky feathered birds because f is recessive and must occur in a homozygous condition in order to manifest phenotypically. Therefore, the genotype ratio is 2Ff: 2ff.
See the punnett square attached for more information
