During meiosis crossing over occurs at the pachytene stage, when homologous chromosomes are completely paired. At diplotene, when homologs separate, the sites of crossing over become visible as chiasmata, which hold the two homologs of a bivalent tighter until segregation at anaphase.
I believe
this is a true statement
Answer:
Explanation:
Law of conservation of energy states that energy can neither be created nor destroyed. Thus, in relation to the question, as the object slides down the ramp, the kinetic energy should increase at the same rate the potential energy is reducing in such a way that the kinetic energy of the object at the bottom of the ramp should be equal to the potential energy of the object at the top of the ramp (since the energy was been "transferred" as the object moved). However, this situation only occurs, as explained, in the absence of friction. <u>In the presence of friction, some of the energy is used to overcome friction as the object moves down the ramp and as such there is an energy loss due to friction in the process which makes the kinetic energy at the bottom of the ramp not equal to the potential energy at the top. This also does not violate the law of conservation of energy since no energy was destroyed in the process (as all the energy involved can be accounted for)</u>.
Answer:
4
Explanation:
A nucleotide consists of a sugar molecule attached to a phosphate group and a nitrogenous base
The answer that will complete the sentence is lack of
eutrophication. It is because eutrophication is considered to be important for
marine animals as this provides the bodies of water nutrients in which the
marine animals need and if they are lacking, the species composition may
change, the coral reefs may be destroyed, the oxygen that are dissolved are at
low level and what is more serious, dead zones can be formed in which the
ecosystem in the marine life may be destroyed or collapse.
