Answer:
(a) Gg × Gg; (b) genotypic = 1:2:1, phenotypic = 3:1
Explanation:
a) A cross between two gray seeded plants produces progeny with gray and white seeds in 3:1 ratio (302:98=3:1). This means that the parent plants are heterozygous and each has at least one recessive allele. If the allele "G" is responsible for gray seed and the allele "g" imparts white color to the seeds, the genotype of the heterozygous parents would be "Gg".
b) A cross between two heterozygous gray seeded parents would produce progeny in following ratio:
Genotype ratio= 1 GG: 2 Gg: 1 gg
Phenotype ratio= 3 Gray: 1 white
Fertility Rate
Mortality Rate
Immigration
Emigration <span />
Answer:Plants use carbon dioxide to make food
Explanation: Carbon-dioxide plays a very important role in sustaining life on Earth.
Plants use carbon-dioxide and water for photosynthesis in presence of sunlight and chlorophyll to produce food and oxygen.
CO₂ + H₂O → O₂ + glucose (food)
This food is consumed by the animals and oxygen is used for respiration. Animals use energy from the food to do work and exhale back carbon-dioxide.
Answer:
Maintain homeostasis.
Explanation:
Homeostasis is the ability to maintain a stable internal state. All organisms need to maintain homeostasis and must regulate their internal environment to process energy and stay alive. Rubbing your arms and shivering is your body's natural response to getting colder and trying to warm up. The students body is responding to the cold environment in order to maintain homeostasis - in this case the proper body temperature of 98.6°F or 37°C.
Answer: B
Explanation: when coal lights it gives off heat energy
