English-
Definition of minerals -
a solid inorganic substance of natural occurrence.
Spanish-
Definición de minerales -
una sustancia inorgánica sólida de ocurrencia natural.
Answer:
75% will have smooth kernels
Explanation
3 out of 4 of the offspring will have the dominant trait of smooth kernels. So, 75%.
Answer:
C. It is reduced at the end of the electron transport chain, forming water.
Explanation:
Oxygen is the <u>ultimate acceptor of electron </u>during respiration. It accepts the electron which flows through various complexes of the electron transport chain (ETC) and in the end gets reduced to produce water molecule (H₂O). In the absence of oxygen, aerobic respiration cannot occur because the lack of oxygen will lead to the inhibition of the Krebs cycle. It happens because Krebs cycle needs NAD⁺ and in the absence of oxygen, ETC will not operate so NAD⁺ will not be produced. Thus even if oxygen is not required by Krebs cycle directly, indirectly it is essential for Krebs cycle to operate.
In view of above, we can infer that oxygen is essential for aerobic respiration to occur and in the absence of oxygen only anaerobic respiration which produces less ATP can take place.
Answer: I, II, III and IV.
Explanation:
Drought tolerance is the ability of the plant to survive and adapt to drought or arid conditions.
When plants encounter drought, they produce dress hormone called abssisic acid. These hormone then activate the cells receptors and the receptors cause some changes in the plants.
The receptor causes the guard cells of the stomata to close to reduce and cause cessation of plant growth to in order to reduce water consumption of plant.
Once the stomata is closed, there is decrease in transpiration which reduce water loss but still allow carbondioxide to enter.
Examples of drought tolerant plants are agaves, wallflower, lantana, lithops, portulaca e.t.c.
Answer:
Bb and Bb
Explanation:
Let B be the allele of a black color; &
Let b be the allele of a white color
Allele B is dominant over allele b, and as such it masks the expression of allele b
If we have a cross between two heterozygous individuals
i.e Bb × Bb
we have:
B b
B BB Bb
b Bb bb
From above, Phenotypically;
we have the following offspring:
BB ; one normal black color
2 Bb: two heterozygous for black color
bb : one white color
The color ratio is in the ratio of 3 black :1 white which is synonymous to 10 black : 3 white
So; we can therefore conclude that the genotype of the parents are :
Bb and Bb
