Answer;
B. The offsprings will inherit one gene from each parent.
Explanation;
F1 (first filial) generation are the offsprings from the cross between the parents. In this case from Yellow seeds (YY) and green seeds (yy); the yellow seeds are dominant over the green seeds.
After crossing; each F1 generation will contain a genotype, Yy,-heterozygous, which means the phenotype will be yellow seeds since it is dominant over the green seeds. Each offsprings is formed by obtaining one allele from each parent; that is Y allele from yellow seed and y from the green seed.
Answer:
B. Sodium ions directly enter the cells, indicating the signal is transduced by an ion channel.
D. Sweet utilizes the GPCR signaling pathway, activating phospholipase C.
Explanation:
The taste received by the taste buds is processed through different channels
a) The Sweet, bitter, and umami tastes are transduced by the GPCR (G-protein-coupled receptors) signaling pathway
b) Sour taste reaches the taste bud through the acidification of acid-sensitive membrane proteins with in the taste cell
c) The epithelial sodium channels in the renal tissues directly takes up the salty taste
Hence, option B and D are correct
Nitrogen is a crucially important component for all life. It is an important part of many cells and processes such as amino acids, proteins and even our DNA. It is also needed to make chlorophyll in plants, which is used in photosynthesis to make their food.
In order for plants to assimilate nitrogen directly into their system, the nitrogen must be in the form of nitrates. Nitrogen in the air and ammonia from decayed matter in the soil is converted to ammonium by decomposers and nitrogen-fixing bacteria. The ammonium is further nitrified to nitrates by nitrifying bacteria. Finally, the nitrates can then absorbed by the plants.
