A(n) ________ may be used to outline structures of the urinary system, including any stones larger than 2 mm.

1.

Freckles are caused by a dominant allele (F).

Marcus and Olivia have recessive homozygotes for the characteristic, ff, if neither of them has freckles.

Olivia's genotype is thus ff.

Marcus has a ff genotype.

Given that they are both recessive homozygotes for the ff gene, there is little chance that their offspring will have freckles.

2.

The straight hairline allele, W is recessive to the widow peak allele, W.

Marcus and Olivia share the hairline trait heterozygosity Ww.

The likelihood of a widow having children is highest when:

Ww = Ww, Ww, Ww, and ww

Widow's peak probability (WW or Ww) equals 3/4

The likelihood that a youngster will have a straight hairline is 1/4.

The likelihood that the offspring will be homozygous

3.

The attached-lobule trait, e, is recessive to the free-lobule trait, E.

The trait, EE, is homozygous dominant in both parents.

One to zero is the ratio of free to connected lobes.

The offspring will be homozygous dominant free lobules, EE, in all cases.

4.

The ability to taste bitter flavors is dominant (T).

Marcus is a recessive homozygote for the trait "tt" since he cannot sense bitterness.

Olivia possesses a "Tt" heterozygote for the trait.

Tt tt equals Tt, Tt, tt, and tt.

There is a 50% chance that each of their kids will try the PTC paper.

Violet's genotype is tt since she cannot taste PTC paper.

5.

T, tongue rolling is a dominant characteristic.

Marcus and Olivia both have tt genotypes since neither of them can roll their tongues.

tt = tt = tt = tt

Therefore;

Their offspring won't be able to roll their tongues.

No hybrids will be born to them.

The entire family shares the genetic tt.

6.

A dimple is a dominant trait (D)

The four youngsters all have dimples.

Therefore,

It's possible that both of their parents carry the dominant allele for the characteristic "DD" or

One of them is heterozygous, or "Dd," and the other is homozygous.

The dominant h0m0zygote "DD" is one of them, while the recessive h0m0zygote "dd" is the other.

Therefore, at least one parent must have a dimple.

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Explanation:

1 chemical reaction endothermic

2 physical change. exothermic

3 chemical reaction endothermic

Answer:

1. Chemical reaction   |    Endothermic

2. Physical change     |    Exothermic

3. Chemical reaction  |     Endothermic

Explanation:

• Chemical reaction or Physical change?

A chemical reaction occurs when one or more substances converted into one or more different substances; they are usually irreversible.

A physical change occurs when the state of matter, or any other physical property, of a substance changes; they are usually reversible.

• Endothermic or Exothermic?

An endothermic reaction or change is one in which the system takes in thermal energy.

An exothermic change is where thermal energy is given out by the system.

Arthropods are the most diverse group of living organisms because they have developed a better adaptation to different environments.

Arthropods are invertebrate animals of the phylum Arthropoda, characterized by a chitinous exoskeleton and multiple jointed appendages.

Arthropods are represented in every habitat on Earth and show a wide variety of adaptations.

Therefore, Arthropods are the most diverse group of living organisms because they have developed a better adaptation to different environments.

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M. J. Schleiden:

In the year 1838, a German botanist presented the first cell theory (Although his theory was ultimately disproved, it did contribute to a change in scientific focus to cellular processes.)

All living creatures and body tissues are made up of the smallest unit that can live on its own. The cell membrane, nucleus, and cytoplasm are the three primary components of a cell. The cell membrane encloses the cell and regulates the molecules that enter and exit it.

His theory: Cells make up all plant tissues, and an embryonic plant is made up of just one cell. He declared that the cell is the fundamental building block of all plant matter.

Louis Pasteur- 1855 - German physiologist, physician, pathologist; and anthropologist. Added a third to the cell theory: Omnis Cellula e cellula (all cells develop only from existing cells).- Implied that there was no Spontaneous generation.

Rudolf Virchow- In 1862 he conducted a famous experiment supporting the theory that cells can only come from other cells.

His experiment:

Steralized flasks with straight and curved necks were used to heat nutrient broths. Bacteria only developed in the straight necks because bacteria cells from the air settled in the S-shaped necks' curves. Spontaneous gen did not produce proven cells in the broth.

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Rudolf Virchow's and Louis Pasteur's contradicted the theory of spontaneous generation, which state that a living organism originates from non-living matter.

According to this theory, it was believed that dust creates fleas, maggot arises from the rotten meat, wheat and bread left in the dark corner producing mice.

Louis Pasteur was the first scientist to prove that cells originate from pre-existing cells.

Rudolf Virchow proposed that Omnis cellula e cellula, which means each cell comes from another cell.

All living creatures and body tissues are made up of the smallest unit that can live on its own. The cell membrane, nucleus, and cytoplasm are the three primary components of a cell. The cell membrane encloses the cell and regulates the molecules that enter and exit it.

Thus, this could be the answer.

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Answer:

A. It saves energy for the organism to produce fewer chromosomes.

B. Asexual reproduction requires fewer chromosomes than sexual

reproduction

C. If it did not, the chromosome number would double in each

generation

D. Organisms reproduce sexually by joining two tetrads together.

collagen fibers, I hope this was helpful to you :)

The vertebrates that first invaded the land possessed a series of pre-adaptations, such as air-breathing and limb-based locomotion, that allowed them to move about effectively on land; however, other behaviors such as reproduction and swallowing likely tied these vertebrates to the water

When moving to land, animals faced several changes to adapt to the new environment, like lung and limbs development, tegumentary cover, and internal fertilization.  

Any change to a new environment needs adaptations.

Aquatic animals had to face many changes in their morphology and physiology when changing to terrestrial habits. Some of them are,

The most significant change is probably lung development, needed to produce gas interchange between tissues and the air.

Once on the ground, animals need to interchange oxygen and carbon dioxide with air. They managed to do so through the respiration process in which the circulatory and respiratory systems work together.

Animals needed to develop a new thicker and harder tegumentary cover.

It needed to be more resistant, especially to avoid or reduce dehydration.

Also, the tegument provides protection when facing new environmental pressures -predation among them-.

Another significant change was limb development, which was obviously needed to move on the ground.

Locomotion on the ground required a new pattern of bone arrangement and many muscle changes.

The muscular system suffered many modifications because animals needed to move facing gravity pressure.

Animals needed to face another change related to their reproductive system.

They could no longer make use of external fertilization, as they used to do in aquatic environments.

They developed reproductive organs needed to insert sperm cells into the female body and fertilize the egg cells inside the females.

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Answer:

option d

central vacuole

Answer:

Animal cells do not have a central vacuole. Central Vacuole is used to store water and maintain turgor pressure in plant cells. Hope it helps!

Answer:

False

Explanation:

The chemiosmotic hypothesis states that the flow of electrons through an electron transport chain generates a proton gradient that leads to the synthesis of ATP.

(ps.  im so sorry if this is wrong, i've never done this before lolol

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