Answer/Explanation:
Recall:
Volume of a sphere = ⁴/3πr³
Surface Area = 4πr²
✔️For radius (r) = 1 mm:
Volume = ⁴/3 × π × 1³ = 4.19 mm³
Surface Area = 4 × π × 1² = 12.57 mm²
Ratio of volume to surface area = 4.19 : 12.57 = 1:3
✔️For radius (r) = 3 mm:
Volume = ⁴/3 × π × 3³ = 113.1 mm³
Surface Area = 4 × π × 3² = 113.1 mm²
Ratio of volume to surface area = 113.1 : 113.1 = 1:1
Answer:
C, bacterial cells dividing
Explanation:
because these are simple, one celled organism, they don't reproduce with male and female, instead they go through mitosis which is when a cell divides into two to reproduce. while A does include this, since skin belongs to a bigger organism it doesn't count as reproduction. B talks about development/growth, and D talks about something completely different to reproduction. hope it helped
B. White petal colour is a recessive trait.
Explanation:
In Mendelian genetics, the alleles depicted in small letters are recessive traits.
Since both alleles are same and in lower case they are homozygous recessive alleles for a white coloured petal gene.
The genotype of the trait will be tt because if it is crossed either with heterozygous or homozygous P alleles it will appear as tt to have phenotypic trait of white colour.
So the genotype will be tt.
Resting metabolic rate is the rate in which your body burns energy to function while at rest.
The movement in phloem is bidirectional, whereas, in xylem cells, it is unidirectional (upward).