Answer:
The endosperm is formed
Explanation:
double fertilization, in flowering plantreproduction, the fusion of the egg and sperm and the simultaneous fusion of a second sperm and two polar nuclei that ultimately results in the formation of the endosperm (the food-storage tissue) of the seed. This is called double fertilization because the true fertilization (fusion of a sperm with an egg) is accompanied by another fusion process (that of a sperm with the polar nuclei) that resembles fertilization. Double fertilization of this type is unique to flowering plants (angiosperms) and is responsible for the formation of both the embryo and its potential food source in the seed.
Answer:
We would expect 63 snails to be homozygous recessive for both traits.
Explanation:
Dihybrid cross
This is a cross between two distinct groups with different observed traits. Independent segregation is observed on the allelic pair for the genes in the separate chromosomes.
The first filial generation produces 4 similar offspring, the second filial generation, would demonstrates a phenotypic ratio of 9:3:3:1.
On dividing the 1,000 progeny on the aspect of phenotypic ratio 9:3:3:1, we can infer an approximate number of 63 (62.5) snails to be homozygous recessive for both traits.
We will calculate on the aspect of the phenotypic ratios and proportions,
Therefore
9+3+3+1 = 16.
1,000*1/16 = 62.5
62.5 can be approximated to 63
Polyoma vaccine does the Polyomavirus. It’s recommend that parrots get this vaccine yearly.
Answer
Adaptation,
Explanation:
The set of characteristic an organism exhibit in order to survive in an environment is called adaptation. This may be changes in physical characteristic or adjustment in the usual behaviour.
Generally for an organims to survive in his habitat adaptation is important.It is usually due to interaction of the effects of environments with the genotype and phenotype of the organism. Thus mutation which gives variation is the factor which makes organism to adjust to the habitat. Therefore adaptation of organism to the habitat is dictated by the selective pressure in the habitat. And this is passed down to subsequent generation.
Thus Shamar sensory cells gained adaptation with time, and she was able to sit comfortably in the tub. The behavioural and physical changes she demonstrated at onset were the necessary changes needed to adapt.
Generally it can be physiological, behavioural, physical or structural depending on the need to adjust to the habitat.
