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4 years ago

I need help this is about hypothesis

Biology

1 answer:

vovikov84 [41]4 years ago

5 0

Water helps the plant by transporting important nutrients though out the plant. Nutrients is drawn from soil and used by the plant. So basically water is important because it helps the plants stand and also have nutrients though out the plant cause without it the plant droop. Does that even make sense? If not I’ll write another summary <3

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In fruit flies, straight wings are dominant and curly wings are recessive. What will the generations look like? Assume that Mend

anzhelika [568]

Answer:

The P generation has straight wings and curly wings.

The F1 generation has all straight wings.

The F2 generation has straight wings and curly wings.

Explanation:

This question involves a single gene coding for wing shape in fruit flies. The allele for straight wings (S) is dominant over the allele for curly wings (s). This means that allele "S" will mask the phenotypic expression of allele "s" in a heterozygous state.

According to the question, the cross follows all Mendel's method of crossing two true breeding parents with opposite traits. Hence, the parent generation (P generation) will be between a truebreeding straight wings parent (SS) and a truebreeding curly wings parent (ss). (See attached image for full cross).

Since the straight wing allele (S) is dominant, all the F1 offsprings will possess straight wings with the genotype: Ss, which is heterozygous.

If this F1 offsprings are self-crossed i.e. Ss × Ss, four possible offsprings in the phenotypic ratio 3 straight wings : 1 curly wing will be produced in the F2 generation. The offsprings will possess the following genotypes: SS, Ss, Ss, and ss.

Offsprings SS, Ss, and Ss will all be phenotypically straight-winged

Offsprings ss will be phenotypically curly-winged.

In overall, this means that P generation has both straight and curly wings (SS and ss), F1 generation has only straight wings (Ss), F2 generation has both straight and curly wings (SS, Ss and ss).

7 0

3 years ago

(In one or more paragraphs) Explain why some flowers look like insects or birds that are their primary pollinators? Please help

My name is Ann [436]

Answer:

Due to feeding on the nectar of flower.

Explanation:

Some flowers look like insects or birds that are their primary pollinators because these insects or birds feeds on the liquid present in that liquid. The flower has liquid inside it which is known as nectar that is the food for many insects and birds so when these birds came to these flowers for feeding they also leads to pollination so that's why some insects and birds are the primary pollinators of some flowers.

7 0

3 years ago

With the use of site-directed mutagenesis, hemoglobin has been prepared in which the proximal histidine residues in both alpha a

nirvana33 [79]

Answer:

The modified hemoglobin with free imidazole cannot be expected to show cooperativity in oxygen binding. The movement of iron ion takes place up in the plane of heme when binding of one subunit of hemoglobin takes place with oxygen. One of the iron's and oxygen's axial ligands comprise the proximal histidine's imidazole ring.

With the movement of iron into the hemoglobin ring, the pulling of proximal histidine takes place along with it. Therefore, when binding of oxygen takes place with one subunit, a modification also takes place in the intersubunit associations, this also comprises displacement of the alpha helix. This phenomenon plays an essential role in modifying the hemoglobin's tensed state to the relaxed state. The withdrawal or mutation of the imidazole ring from the histidine residue does not further permit the cooperative binding as it is not associated physically with the alpha-helix.

7 0

4 years ago

What do mitochondria and chloroplasts have that golgi apparatus and endoplasmic reticulum lack?

Readme [11.4K]

Answer: Mitochondria and Chloroplast have double membrane(inner and outer) but golgi apparatus and endoplasmic recticulum have single membrane.

Explanation:

Mitochondria is referred to the power house of the cell where energy is produced.

Chloroplast is the organelle found in green plants use for photosynthesis to produce energy. Both chloroplast and mitochondria are found in multicellular organisms and their function is to produce energy. The both have double membrane bound organelles.

Golgi apparatus and endoplasmic reticulum are single membrane bound organelles and they are found in eukaryotic cells. The endoplasmic recticulum transport synthesized protein to vesicles of Golgi apparatus.

3 0

3 years ago

Read 2 more answers

What are routes followed by nerve impulses as they pass through the nervous system?

n200080 [17]

Nervous system involves transmission of impulses from the receptors to the effector cells. it involves the detection of the stimuli by the receptor cells (includes the skin,eyes,mouth), then the stimuli is carried by the sensory neurone (joins the receptor cells and the spinal cord) to the central nervous system (the spinal cord), then the impulse is picked by the relay neurone and taken to the brain for processing, where the brain interprates the stimuli and sends a response. then the relay neurone from the brain joins to the motor neurone which connects the brain and the effector cells. The motor neurone carries the message to the effector cells (muscles and the glands), and finally a response is experienced in the specific place of the body by either movement of body muscles or secretions by the glands.

3 0

4 years ago