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3 years ago

3. When looking at the DNA of an elephant, a crocodile, and a sheep., which two animals do you

Biology

2 answers:

Viefleur [7K]3 years ago

6 0

Answer:

The elephant and the sheep exhibit higher sequence similarity because they are more closely phylogenetically related

Explanation:

The elephant and the sheep are mammals, while the crocodile is a reptile, being the mammals the most inclusive group among these three species and it appeared later in evolution. Mammals are organisms that have shared evolutionary features such as warm blood, they produce milk and have hair

Scrat [10]3 years ago

4 0

Answer:

The elephant and the sheep are genetically closer to each other than they are to crocodiles.

Explanation:

Reptiles and mammals share a common ancestor. Mammals got separated from reptiles and evolved to explode different ecological niches.

The subclass Synapsid is a reptilian groups that precedes mammals in evolution. The therapsid order is an advanced group of synapsids and the direct ancestor of mammals.

Crocodiles are reptiles, while elephants and sheep are terrestrial mammals. According to phylogenetic evolution, crocodiles sheep and elephants share a common ancestor, but during evolution, the mammals' group (sheep and elephants) got separated from reptiles (crocodile).

Sheep and elephant got separated later in the evolution.

There are physical traits that confirm this.

Reptiles are cold-blooded animals, have squamous skin, vertical pupils, they are oviparous so they lay eggs were the embryo develops,

On the other hand, mammals are warm-blooded animals, have hair in the skin, females have milk glands, and they are viviparous so the embryo develops in the placenta.

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True of false Mendel realized that when he crossed two pea plants that were the offspring of a pea plant with yellow peas and a

Sonbull [250]

Answer:

False

Explanation:

Mendel realized that the F2 had a phenotypic ratio 3:1, meaning 3/4 = 75% were yellow and 1/4 = 25% green.

Mendel observed that the F1 expressed only one of the alternative variants (in this case, only yellow seeds appeared), while the other variant (green) disappeared. Mendel named dominant the expressed variant. Mendel allowed auto pollination and observed that in the second generation, F2, the other disappeared variant reappeared. Both alternative variants were present in the F2. Mendel named recessive the second alternative variant.

Mendel thought that hereditary traits determined by discrete factors were the possible explication for these phenotypes. These factors should have been present in the F1 in pairs. One of them came from one parental plant, and the other factor came from the other plant. These factors then separated again when sex cells were produced, giving two types of gametes, each with only one factor.

Mendel concluded that each individual (plant) has a pair of factors (alleles), one for each trait (yellow and green) and that the pair separates (segregates) during the formation of the gametes. This conclusion is known as the segregation principle (First Mendels´ Low).

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3 years ago

What would be a limiting factor in an ecosystem?

Feliz [49]

D. population and nutrients

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What is it about the life-cycle that makes cane toad populations successful?

Svetllana [295]

Cane Toads are very strong and adaptable, they are also poisonous throughout its life cycle, which is why they only have a few predators and have a life span of 10-15 years. Cane toads have poison glands, and the tadpoles are extremely toxic to most animals if consumed. They are productive breeders, they only need a small pool of water of almost any nature. The female cane toads can lay 8,000 to 35,000 eggs at a time and may produce two clutches in one year. The eggs will hatch within 24-72 hours and the tadpole stage may last from three to twenty weeks. Cane toads in the tropics grow really quick and may be sexually mature only within one year. Cane toads have been introduced to many regions of the Pacific and the Caribbean islands as a method of agricultural pest control because of their ravenous appetite, however, they are now considered pests and are dangerous to humans and animals, both wild and domesticated especially to dogs.

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4 years ago

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What other system does the circulatory system work with?

Svet_ta [14]

Answer:

The respiratory system.

Explanation:

The circulatory system works with the respiratory system. The circulatory system transports oxygen through the body, while the respiratory system supplies the body with that oxygen.

I hope this helps. Happy studying. :)

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3 years ago

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What is NOT enough to sustain swimmers going at top speed

mixer [17]

Answer:

To swim faster

Reducing the drag. As with all the other tips here this one is not about how strong you are as the right technique smoothes out your swimming using your strength in a much more efficient way.

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