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hram777 [196]
3 years ago
11

During which stage is the placenta form completely???? Plz help I’ll give u the brain kissy answer

Biology
1 answer:
zloy xaker [14]3 years ago
6 0
The placenta forms at 8 weeks, and develop for 6 weeks. hope this helps 
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HELP ME PLEASE! I GOT TO GO SOON!!
REY [17]
I think so. Not every mutation will cause a transformation in the amino acid sequence of proteins. Some might not even have an effect on the protein they encode at all.
7 0
3 years ago
Sugars in the phloem are:
Natasha2012 [34]

Answer: b. nonreducing sugars which include among others raffinose, verbascose and stachyose

Explanation:

Phloem is defined as the vascular tissue which functions for the transport of sugars from source tissues, proteins and mRNAs throughout the plant.

Sugars present in phloem are non-reducing oligosaccherides which includes  raffinose, verbascose and stachyose. Verbascose has three α-d-galactose molecules that are attached to sucrose; stachyose has two, and raffinose has one. The oligosaccharides are α-1, 6-galactosyl sucrose extensions (Suc). Those are present in plant phloems like Bignoniaceae, Oleaceae, Celastraceae, Myrtaceae, Verbenaceae and others.

These all functions for the transport of sugar in phloem sap and as storage sugars.

Hence, the correct option is b. nonreducing sugars which include among others raffinose, verbascose and stachyose

4 0
3 years ago
In order to measure the absorption spectrum of CoCl2, you need to dilute the stock solution to 0.32 M. What volume of the stock
Butoxors [25]

Explanation:

Volume of stock solution needed

= 10mL * (0.32M/0.8M)

= 10mL * (4/10) = 4mL.

Volume of water needed

= 10mL - Volume of stock solution

= 10mL - 4mL = 6mL.

6 0
3 years ago
What does sexual reproduction and asexual reproduction have in common?
dlinn [17]
Sexual reproduction. Sexual reproduction is more much complex than asexual reproduction. It requires the production of sex cells, or gametes , which have half the number of chromosomes of all other cells in the organism. ... Once the gametes are made in the male and female, they must meet with one another to form offspring
3 0
4 years ago
Which statement provides a possible explanation for the growth
Shtirlitz [24]

Answer:

<u>3) Uncontrolled cell division occurred as a result of gene mutations</u>

<u />

Explanation:

Spontaneous modifications within the genome may occur during the process of cell division. When copies of the DNA inside the cell are made, these mutations cause errors; and can include small single nucleotide polymorphisms, and large scale additions or deletions across multiple genes.

Some, like somatic mutations, exist only inside vegetative (body) cells, that cannot be passed onto offspring. This is caused by several factors like

  • UV radiation,
  • chemical mutagens,
  • infective agents

UV radiation damages strands of DNA, by causing dimers to form; here, consecutive nucleotide bases covalently bond instead of those on the complementary strand. This conformational change causes errors in DNA proofreading and repair mechanisms where bases are not well-incorporated into the strand- tumors (clumps of uncontrolled cell growth) may form, resulting in melanoma, a type of skin cancer.

5 0
3 years ago
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