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3 years ago

4. Compare the pig brain to drawings of a human brain, a fish brain, and a bird brain. Can

Biology

1 answer:

DanielleElmas [232]3 years ago

5 0

Pigs are more closely related to the human than birds and fishes.

<h3><u>Explanation</u>:</h3>

Development of brain is a very interesting and important marker to evaluate evolutionary relationships between the species. Brain is most complex organ of an animal's body and with evolution, it becomes more and more complex.

If we see into fish brain, we will see more simpler structures with only 10 cranial nerves. But with evolution as the birds came, it was more complex. But it was nowhere near with humans.

With the pigs, we can relate the level of complexity and the structures of brain along with the skull to cranium ratio much matching with that of humans.

So pigs are much more related to humans than others.

This is also evident that although all are chordates, the fishes belong to class Pices, birds to Class Aves and both pig and human to class Mammalia.

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Two short-haired guinea pigs are mated several times. Out of 100 offspring, 25 of them have long hair. What are the probable gen

Alekssandra [29.7K]

Answer:

Ss (male) × Ss (female)

Explanation:

This question involves a single gene coding for hair length in guinea pigs. Based on the information in this question, the allele for short hair (S) is dominant over the allele for long hair (s). This means that a guinea pig will only be phenotypically long-haired if the genotype is "ss".

According to this question, Two short-haired guinea pigs are mated several times. Out of the 100 offsprings produced by this cross, 25 of them have long hair (recessive). This means that the phenotypic ratio of this cross is 3 short hair : 1 long hair i.e. 100 - 25 = 75 short hair. 75/25 = 3/1 = 3:1

To produce this phenotypic ratio, the parents must both be heterozygous (Ss) for the hair length gene.

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3 years ago

What is the difference between an organisms habitats and niche ?

VladimirAG [237]

<span>Organism's habitat (where a species live) can be described as all of the biotic and abiotic factors in the area where an organism lives.
b. Ecological niche (how species live) is composed of all of the physical, chemical, and biological factors that a species needs to survive, stay healthy and reproduce. The niche includes food, abiotic conditions, and behavior.</span>

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3 years ago

Leaves attach to stems at nodes t or f

aleksandrvk [35]

True, all leaves at them stem calling the process "Nodes"

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A branching diagram uses shared characteristics to classify organisms.On a branching diagram that compares the major kingdoms of

lapo4ka [179]

Animalia is the label that appears to differentiate animals from organisms on other kingdom.

Explanation:

Scientists uses the process called taxonomy to classify the organisms based on their structure, functions and relationship to other organisms.

Eukaryotes represents the domain of life. Domain Eukarya are classified into four kingdoms they are protista, fungi, plantae and animalia.

The kingdom protista represents the organisms that are simple structured and they swim through the water and obtain nutrients from the environment.

In the kingdom fungi like mushrooms absorb nutrients from the environment and they are heterotrophs.

In the plantae kingdom the organisms are plants and they are autotrophs. They prepare their own food.

In Animalia kingdom the organisms are animals and they are multicellular heterotrophs. They do not have cell walls and the reproduction is done sexually and some can reproduce asexual.

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3 years ago

Skin has epithelial cells that resist stretching and twisting because they are held together by what

KatRina [158]

The epithelial cells resist stretching and twisting in the skin because if desmosomes that holds them together. The desmosomes are the one responsible for the cell to cell adhesions, making them be tight or held together as this is its structure.

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3 years ago