When cells get too large, they not cannot properly expel waste or bring in enough nutrients, and so they begin to fail. In organisms, especially humans, mitosis divides the cells.
Interphase: cell is growing and going through normal functions
Mitosis: cell's genetic material and nucleus divide
Prophase: chromatin condenses, nucleus breaks down, centrioles move to opposite sides, spindle forms and pulls sister chromatids apart
Metaphase: spindle fibers move to the middle of the cell
Anaphase: sister chromatids separate, spindle shortens, pulling chromatin to opposite sids
Telophase: chromosomes reach opposite sides and uncoil,nuclear membrane forms around genetic material again
Cytokinesis: division of the cytoplasm
End Result: two genetically identical cells
Answer:
A) They share short homologies at their respective tips
Explanation:
The cells of human contain two types of chromosomes that is autosomal and sex chromosomes.
The 22 pairs of autosomal chromosomes in humans are formed by the pairing of these chromosomes during the meiotic phase via the formation of a structure called synaptonemal complex between homologous sequences.
However, the two types of sex chromosomes called X and Y are not similar in their length but they pair via the formation of synapse which involves very short homologous sequences called "pseudoautosomal regions". The formation of the synapse through this region is called the X-Y body.
Thus, Option-A is the correct answer.
Explanation:
Isotopes:
₁₅³¹P and ₁₅³²P
Given parameters:
₁₅³¹P ₁₅³²P
Mass number = 31 32
Atomic number = 15 15
The two atoms are isotopes. Now let us derive numbers of their subatomic particles
₁₅³¹P ₁₅³²P
Protons 15 15
Electrons 15 15
Neutrons (31-15) = 16 (32-15) = 17
Because they are isotopes, they differ in the number of neutrons alone.
Isotopy is the existence of two or more atoms of the same element having the same atomic number but different mass numbers due to the differences in the number of their neutrons.
We clearly see that the mass number and number of neutrons pertaining to the atom differs. This makes them isotopes.
Learn more:
Isotope brainly.com/question/1915462
#learnwithBrianly
Density dependent factors are those that regulate the growth of a population depending on its density while density independent factors are those that regulate population growth without depending on its density
Good Morning!
Metamorphic rocks are formed from other rocks that are changed because of heat or pressure. They are not made from molten rock – rocks that do melt form igneous rocks instead. ... They do not melt, but the minerals they contain are changed chemically, forming metamorphic rocks.
Hope this helps!
Please mark me brainliest!
Have a great day!
~Courtney
