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nika2105 [10]
3 years ago
11

Which structure is part of Pinus contorta reproduction, but not part of fern reproduction? micropyle gametophyte protonema sporo

phyte
Biology
1 answer:
elena-s [515]3 years ago
5 0

The correct answer is Micropyle.

The micropyle can be defined as opening in the ovum that allows the pollen to enter into it for the process of fertilization. In gymnosperm the pollen is drawn into the ovule on a drop of fluid that comes out of the micropyle, called as pollination drop mechanism. Micropyle is  present in gymnosperm and absent in pteridophytes.




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Vegetable shortening is a food product rich in trans fatty acids. It is produced by converting several cis double bonds totransd
liraira [26]

Answer:

Partial hydrogenation

Explanation:

Vegetable oils naturally contain cis fatty acids. These fatty acids have double bonds and the two H atoms are on the same side of bond, producing a kink in  the structure.

Cis fatty acids are converted into trans fatty acids by the process of partial hydrogenation or vegetable shortening. Hydrogen is added to convert some of the double bonds into single bonds but all double bonds are not removed. However, the cis double bonds end up getting converted to trans double bonds. H atoms are now on the opposite sides of the double bond. This arrangement makes the kink disappear from the structure hence trans fat is structurally similar to saturated animal fat. It increases the longevity of fats and makes it solid at room temperature but also has many side effects like increasing bad LDL cholesterol in blood.

7 0
3 years ago
Before osmosis - 10 water molecules water and 4 molecules of salt inside the cell and 10 water molecules and 6 salt molecules ou
saveliy_v [14]

Answer:

no net change since osmosis involves movement of water

Explanation:

Osmosis is defined as the net movement of water molecules through a semipermeable membrane from a region where their concentration is low to a region where their concentration.

3 0
3 years ago
A part of an mRNA has the sequence CCG. Which change to this sequence
Flauer [41]

Answer:

A single nucleotide changes in CCG which will result in missense mutation can be many possibilities.

Explanation:

Missense mutations  

CCG codes for Proline amino acid

• Mutation in first nucleotide codes for  

 UCG specifically encodes Serine

 ACG specifically encodes Threonine  

 GCG specifically encodes Alanine                              

                                                                                      Missense mutation  

• Mutation in second nucleotide specify for coding

 CUG specifically encodes Leucine

 CAG specifically encodes Glutamine  

 CGG specifically encodes Arginine

• Mutation in Third Nucleotide will not result in missense mutation because any point mutation in third nucleotide of codon will encode same amino acid i.e Proline.  

4 0
3 years ago
Read 2 more answers
Who proposed the Heleo centric model of the universe in which the planets revolve at different speeds around the sun
Natali [406]
Nicolaus Copernicus, Hope this helps :) 
6 0
3 years ago
What is the probability of getting offspring that are heterozygous for smooth AND heterozygous for yellow from a cross between p
meriva

Answer:

The probability of getting offspring that are heterozygous for smooth AND heterozygous for yellow, RrYy is 1/4 = 25%.

Explanation:

Due to technical problems, you will find the complete explanation in the attached files.

Download pdf
4 0
3 years ago
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