The division of the nervous system that are responsible for activities that are not under conscious control (involuntary)is called autonomic nervous system. Examples of involuntary action are digestion and breathing. This part of the nervous system also control the involuntary activities of the intestines, glands, heart, respiration, metabolism, blood-pressure regulation, etc.
Answer:
9:3:3:1
Explanation:
If two parents for a dihybrid cross are fully heterozygous for two genes, the phenotype ratio comes 9:3:3:1. Here, the alleles of both genes should exhibit complete dominance-recessiveness. This means that one allele of a gene should be able to mask the expression of its another allele. Similarly, alleles of one gene genes should assort in a random manner during anaphase-I irrespective of the assortment of alleles of another gene.
Under these conditions, each parent produces four types of gametes in equal proportion. And the random fusion of these gametes gives progeny in 9:3:3:1 phenotype ratio.
For example, a dihybrid cross between TtRr and TtRr would produce progeny in the following phenotype ratio=
9 tall and red: 3 tall and white: 3 dwarf and red: 1 dwarf and white
Here the allele T gives "tallness" while the allele "t" gives "dwarfism". The dominant allele "R" gives "red flowers" while the recessive allele "r" gives white flowers.
Answer:
Why does deforestation cause forest fires?
Climate change and the cycle of fire
"More deforestation means an increase in climate change, which increases the chances of the vegetation drying out, which in turn increases the risk of fire and so on." And the fires continue to increase greenhouse gases in the atmosphere
Explanation:
Answer:
D
Explanation:
Mutualistic relationships are relationships in which each party, the bees and flowers, benefits from the interaction in some way.
