The correct answer are valves. As lymphnodes become larger and deeper they turn into lymph vessels that develop one-way valves. These valves prevent the back flow of blood throughout the vessel and ensure that the lymph only flows in one direction.
Below are the options:
Having two phases of meiosis allow for more unique cells to be produced.
Meiosis is a form of asexual reproduction which leads to more genetic variation.
Meiosis produces 4 haploid daughter cells which all contain identical DNA segments.
<span>Crossing over during metaphase allows segments of DNA from 2 parents to SWAP and produce non-identical haploid cells.
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The answer <span>Meiosis is a form of asexual reproduction which leads to more genetic variation</span>
Unconformity
Explanation:
The gap between the lower and upper limestone layer can be explained by the occurrence of an unconformity.
An unconformity is a break in stratigraphic record usually marked a prolong period of non-deposition or erosion.
A major break of several millions of years is called a hiatus. A minor break is a diastem.
- During a period of non-deposition, no materials are brought into the basin.
- This can last for several years until deposition resumes again.
- Such a prolonged period of non-deposition causes a break in stratigraphic record.
- At other times, stratigraphic records can be lost to erosion.
- Erosion entails the washing away of the earth.
- This will ultimately cause the loss of records between two strata till deposition resumes.
- In most strata, periods of non-deposition and erosion usually takes place hand in hand.
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Answer:
Temperate coniferous forest is a terrestrial biome defined by the World Wide Fund for Nature. Temperate coniferous forests are found predominantly in areas with warm summers and cool winters, and vary in their kinds of plant life.
