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3 years ago

Help me ..................

Biology

2 answers:

Goshia [24]3 years ago

8 0

Answer:

Explanation:

The first two pictures show an ovum and a sperm so it is 1 for both boxes. The third picture shows embedding into the uterus wall and that is 6.

I was wondering what is this until you posted the questions in another post.

Harman [31]3 years ago

5 0

Answer:

1,1,6

Explanation:

saw ur other post w the actual Q; ans 1, 1 and 6.

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Imagine that a couple is planning to have children. The male is heterozygous for tongue rolling and homozygous dominant for unat

Amiraneli [1.4K]

Answer:

F1 generation: RrUu, rrUU, rrUu, RrUU

25% : 25%: 25%: 25%

Ratios

genotype: 1: 1: 1: 1 ...(from punnet square)
phenotype: 1 : 1

Explanation:

Punnett squares are a diagrammatic way of deciding the characteristics of hybrid offspring created by crosses in genetic breeding. Parental genotypes and phenotypes are widely recognized, and all usually obey normal Mendelian ratios and inheritance.

Mendelian genetics focuses on the origin or heritability of characteristics. Such traits are packed into one's own gamete, acquired by themselves, and sometimes display superiority, where one's impact can mask those of another trait.

These are called the Law of Segregation, Independent assortment and Dominance respectively.

For this cross... Assuming:

Unattached lobes= dominant

Rolling tongue= dominant
Parent generation or P generation:

Gametes:

R → rolling dominant (R), non-rolling recessive (r)

U → unattached dominant (U), attached recessive (u)

P generation: RUrU× rUru

rolling, unattached × non-rolling, unattached

F1 generation: RrUu, rrUU, rrUu, RrUU

25% : 25%: 25%: 25%

Ratios

genotype: 1: 1: 1: 1 ...(from punnet square)
phenotype: 1 : 1

Half the offspring have unattached lobes and can roll their tongues while the other half have unattached lobes and cannot roll their tongues...

Each punnet cross is attached below

6 0

3 years ago

For each of the following structures, first indicate its function in the fetus; then, note its fate (what happens to it or what

natita [175]

Answer:

1. Functions:

a. Umbilical artery >> carries deoxygenated blood from the fetus to the placenta

b. Umbilical vein >> transports oxygenated blood from the placenta to the fetus

c. Ductus venosus >> allows oxygenated blood from the placenta to bypass the liver

d. Ductus arterious >> allows most of the blood from the right ventricle to bypass the fetus's non-functioning lungs

e. Foramen ovale >> oxygenated blood from the umbilical vein to bypass the pulmonary circulation

2. After the bird:

1. Umbilical artery >> medial umbilical ligament

2. Umbilical vein >> round ligament of the liver

3. Ductus venosus >> ligamentum venosum

4. Ductus arteriosus >> ligamentum arteriosum

5. Foramen ovale >> fossa ovalis

Explanation:

The umbilical artery is a paired artery localized in the abdominal and pelvic regions, which carries deoxygenated blood from the fetus to the placenta through the umbilical cord. The medial umbilical ligament is the obliterated part of the umbilical artery that arises from the internal iliac arteries. In utero, the umbilical arteries carry waste products back to the placenta, whereas the umbilical vein carries oxygenated blood from the placenta to the fetus. The round ligament of the liver (also known as ligamentum teres hepatis) is a remnant of the umbilical vein that exists in the embryonic stage, it connects the left lobe of the liver to the umbilicus. The ductus venosus is a slender shunt that allows oxygenated blood from the placenta to bypass the liver, it connects the intra-hepatic portion of the umbilical vein to the inferior vena cava. The ligamentum venosum is an extrahepatic, slender, and fibrous remnant of the fetal ductus venosus that travels between the left portal vein and the inferior vena cava. The ductus arteriosus is a fetal artery that connects the aorta to the pulmonary artery. The ligamentum arteriosum is a nonfunctional vestige of the ductus arteriosus, it is attached to the superior surface of the pulmonary trunk. The foramen ovale is an oval-shaped, small, opening in the wall (septum) between the two upper chambers of the heart. The fossa ovalis is a vestige stricture of the foramen ovale of the embryonic heart, which forms a depression in the right atrium of the heart.

6 0

3 years ago

Which of the following best explains how a hurricane can increase an area’s susceptibility to future storms? a. Storm surges cau

lakkis [162]

Correct answer choice is:

d. Erosion caused by hurricanes can leave coasts more exposed to storms.

Explanation:

Important erosion, rapture, and removal of solids happen through storms. Beach erosion is a typical consequence of the high waves that transpire when hurricanes pass onto land. The decline of sand makes the beach to grow narrower and deeper in elevation. Storm loops take the sand offshore, keeping and depositing the sediment in great sandbars.

pls mark

7 0

2 years ago

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The action by which a plant grows toward sunlight is called

zimovet [89]

When a plant grows toward sunlight it is called positive phototrophism.

3 0

3 years ago

Which statement is one of fact supporting how pH and flower color are related?

Goshia [24]

Yes, pH of the soil affects the colour of flower.

Flowering plants grown in acidic soil (pH<7) bears blue flowers or at has a blueish tint.

Whereas, Flowering plants grown in Neutral (pH=7) and Basic (pH>7) soil bears pink and red flowers.

A plant's flower color is determined by a complex balance between chlorophyll, beta carotene, flavonoids,etc in particular pH of the soil to give out vibrant colors like red, blue, pink, yellow,etc.

7 0

3 years ago

Read 2 more answers

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