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3 years ago

Hi. Please answer these questions :

Biology

2 answers:

polet [3.4K]3 years ago

4 0

<h2>Answer:</h2><h2>Barbados flowers</h2>

<em><u>Caesalpinia pulcherrima is a species of flowering plant in the pea family Fabaceae, native to the tropics and subtropics of the Americas. It could be native to the West Indies, but its exact origin is unknown due to widespread cultivation. </u></em>

<em><u>Scientific name: Caesalpinia pulcherrima</u></em>

<em><u>Scientific name: Caesalpinia pulcherrimaFamily: Fabaceae</u></em>

<em><u>Scientific name: Caesalpinia pulcherrimaFamily: FabaceaeKingdom: Plantae</u></em>

<em><u>Scientific name: Caesalpinia pulcherrimaFamily: FabaceaeKingdom: PlantaeHigher classification: Caesalpinia</u></em>

<em><u>Scientific name: Caesalpinia pulcherrimaFamily: FabaceaeKingdom: PlantaeHigher classification: CaesalpiniaOrder: Fabales</u></em>

<em><u>Scientific name: Caesalpinia pulcherrimaFamily: FabaceaeKingdom: PlantaeHigher classification: CaesalpiniaOrder: FabalesRank: Species</u></em>

musickatia [10]3 years ago

3 0

<h2>Hey There!</h2><h2>_____________________________________</h2><h2>Answer:</h2><h2>_____________________________________</h2><h2> $\huge{\textbf{Plant of Barbados}}$ </h2>

$\texttt{Caesalpinia pulcherrima}$ commonly called Pride of Barbados is found in the tropical regions. It's origin is still unknown but it is believed that Pride of Barbados is native to the West Indies and tropical America. It is widely cultivated in tropical regions throughout the world, which include tropic and sub-tropic region of America. It contains gallic and tannic acid which is poisonous to humans.

As <u>Cesalpinia pulcherria</u> is considered to be native of West Indies or North American region, and the Barbados is a small island country in West Indies, so that's how its common name comes that is the <u>Pride of Barbados</u>. Pride of Barbados belongs to the FAMILY - LEGUMINOSAE and to the SUB-FAMILY - FABACEAE.

$\huge\textbf{Placentation}$

The arrangement of placenta within the ovary is known as placentation. Ovules are attached to the inner wall of special tissues which are called placenta, the ovules are attached by the small stalk called funicules. There are several type of Placentations i.e. Basal, Marginal, central, axile, parietal.

Placentation in Plants of Barbados is Marginal, Marginal Placentation is when in which the placenta forms a ridge along the ventral suture(The line of fusion where the margins of the mega-sporophypl join) of the ovary and the ovules develop on two separate rows is known to have marginal placentation.

$\huge\textbf{Gynoecium}$

Gynoecium is a female whorl of the flower. It is composed of Carpels. Carpel is composed of Sigma, Style and Ovary.

Gynoecium in Pride of Barbados is Monocarpellary(one carpel), Ovary Superior(An ovary attached above other floral parts is termed superior), consist of one chamber(unilocular), many ovules are present along the margin. Seed is non-endospermic and Fruit is legume.

<h2>_____________________________________</h2><h2> $\huge\textbf{Flower:}$ </h2>

Flower is the reproductive organ of a plant. Morphologically it is very modified shoot. It is developed in the axil of leaf or at a.p.e.x of stem & branch. Flower is also produced in group which is called the inflorescence. If stalk called pedicel is present then flower is called pedicellate, If pedicel is absent Flower is called sessile. If small leaf or scale called bract is present then flower is called bracteate, if absent then called ebracteate.

Flower in Pride of Barbados is Pedicellate, complete, bisexual, zygomorphic, perigynous, showy and scented pentamerous.

<h2>_____________________________________</h2><h2> $\huge\textbf{Features}$ </h2>

Butterflies are the primary pollinators of Caesalpinia pulcherrima and the pollen is carried primarily on their wings.
Plant of Barbados is poisonous
It has some anti-inflammatory substances.
This plant grows in sunny regions thus It has great heat resistant feature
It can grow easily in very dry soil. This is due to its drought resistant features.

<h2>_____________________________________</h2><h2>Best Regards,</h2><h2>'Borz'</h2><h2 />

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The cross over frequency between linked genes C and D is 40%; between A and D is 35%; between C and A is 5%; between A and E is

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Answer: The first line shows the Correct order of genes in the chromosome and the second and third lines show the distances between genes.

C ------------ A ---------------------------------- E -------------------- D (Correct order)

/-----5MU--//---------------25 MU-----------//---------10MU-----/ (Distances)

/------------------------------------40 MU ------------------------------/ (Total distance)

Explanation:

We need to know that 1% of recombination frequency = 1 map unit = 1cm. And that the maximum recombination frequency is always 50%.

The map unit is the distance between the pair of genes for which every 100 meiotic products, one results in a recombinant one.

The recombination frequencies between two genes determine their distance in the chromosome, measured in map units. So, if we know the recombination frequencies, we can calculate distances between the four genes in the problem and we can figure the genes order out. This is:

Recombination frequencies:

1% of recombination frequency = 1 map unit (MU)

C-D = 40% = 40 MU

A-D = 35% = 35 MU

C-A = 5% = 5 MU

A-E = 25% = 25 MU

E-D = 10% = 10 MU

Now that we know the distances between pairs of genes, we need to figure out which is the correct order in the chromosome.

C and D are the genes with the biggest distance between them (40MU), which probably means they are in the extremes. The rest of the genes are in the middle.

C ------------------ (40MU) --------------------------------------- D

A is 5 MU apart from C and 35 MU apart from D, which means it is closer to C.

C------ (5MU)----A------------------------------(35 MU)-------D

E is 25 MU apart from A and only 10 MU apart from D, which means it is between A and D, and closer to D

C--------------------A------- (25 MU)---------E----(10MU)-----D

The sum of C-A distance + A-E distance + E-D distance equals the C-D distance. This is:

C-A 5MU + A-E 25MU + E-D 10MU = C-D 40 MU

5 + 25 + 10 = 40

In conclusion, the correct order of the genes in the chromosome is

C ------------ A ---------------------------------- E -------------------- D

/-----5MU--//---------------25 MU-----------//---------10MU-----/

/------------------------------------40 MU ------------------------------/

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Answer:

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From the statement given that is the best option, you can infer. The ones that talk about the protection of people with albinism are not correct because the statement is not referring to that topic.

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I hope this answer helps you.

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