You would expect a scratch on the quartz since quartz is on a hardness scale of 7 and the mineral you are rubbing against it is at a hardness scale of 7.5
I think it is the secondary ovarian follicle that contains the secondary oocyte.The stages of the ovarian cycle that the follicle will go through includes; a primary follicle contains an oocyte and begins producing estrogen. Then the secondary oocyte contains a secondary oocyte and produces estrogen and some progesterone, then the graafian follicle develops and the secondary oocyte is released a process we call ovulation. the corpus luteum produces progesterone and some estrogen and lastly the corpus luteum degenerates.
Answer:
1:2:0
Explanation:
If two recessive lethal alleles come together, they will be expressed and lead to the offspring's death. Let the dominant allele be S and the recessive allele be s. Here, the two individuals are heterozygous for it. So when they mate:
S s
S SS Ss
s Ss ss
1/4 have homozygous fominant genotype (SS), 2/4 have heterozygous genotype (Ss) and 1/4 have homozygous recessive (ss) genotype. Since 1/4 offspring have ss genotype, they will die. Hence, the usual 1:2:1 ratio has been modified here to only 1:2:0
Both Gap junctions and plasmodesmata enable direct material transfer across cells.
<h3>What is Gap junction?</h3>
- Specialized intercellular connections known as gap junctions connect a variety of animal cell types.
- They connect cytoplasms of two cells directly, allowing different chemicals, ions, and electrical impulses to travel through a controlled gate between cells.
<h3>What is plasmodesmata?</h3>
- When it comes to intercellular trafficking, communication, and signaling for plant development and defense.
- Plastodesmata—intercellular pores that connect adjacent plant cells and permit membrane for cytoplasmic continuity is crucial.
- Plasmodesmata allow molecules, from tiny photosynthetic products to big proteins and mRNA, to flow more easily between cells.
- Plasmodesmata is essential for the transport of nutrients via vascular tissue.
- They are also essential during development since plant cells do not migrate like animal cells do.
Learn more about gap junction here:
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Answer:
Explanation:
Portal from the liver into the int estine
