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scZoUnD [109]
3 years ago
15

HELPPPPPPP PLSSS

Biology
1 answer:
stellarik [79]3 years ago
3 0

Answer:

Oxygen enters the lungs through the trachea, which branches into two tubes called the bronchi, which lead to the lungs.

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Record your observations of how the agar cubes look before you add vinegar and then after you add vinegar and stir. How did the
hammer [34]
The vinegar would tend to diffuse into the agar blocks decreasing the amount of vinegar outside the agar cubes and increasing the volume of agar cubes. Diffusion<span> is the movement of particles (ions or molecules) from an area of higher concentration to an area of lower concentration. 

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3 years ago
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Compare and contrast properties of sister chromatids and homologous chromosomes.
lubasha [3.4K]

Answer:

Explanation:

Sister chromatids are regarded as replicated chromosomes. Sister chromatids are two identical copies of chromosomes held at the centromere that are formed as a result of replication. They are identical in the sense that they contain same alleles/gene sequence of the same genes.

Homologous chromosomes, on the other hand, are similar (in length, centromere position) but non-identical chromosomes. Homologous are non-identical in the sense that they may contain different alleles of a gene and are received from each parent. homologous chromosome contain four chromatids; two of which are sister chromatids and non-sister to the other two.

Both undergo meiosis where homologous chromosomes separate in meiosis I while sister chromatids separate in meiosis II but only sister chromatids undergo mitosis.

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3 years ago
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How are the platypus’s bill and feet specially adapted for survival in their environment? (Site 2)
lapo4ka [179]
Platypus is an Australian mammal that lives in deciduous forests. Platypus's bill is adapted in order to allow platypus to travell and find its way in the river without using vision. This adaptation is achieved through special receptors that sense touch and electricity. Platypus's feet are webbed, enabling them to swim fast and efficiently and move easily on muddy surfaces.
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3 years ago
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What’s the difference between alleles that are codominant and those that are incompletely dominant?
gulaghasi [49]

Answer:

Codominant- when both are expressed like in flower red and white are codominant so they mixes to get a pinks flower.

Incomplete Dominants- is when a where cow and brown cow mix the offspring are brown with white patches

5 0
3 years ago
Tom and Jerry start at the same location. Tom is travelling due east at a velocity of 5 m/hr. Jerry is travelling due northwest
Sedaia [141]

Answer:

The distance between them is changing at the speed of 10.16 m/hr

Explanation:

Consider the sketch attached below.

The question is simply asking to calculate the resultant of the two velocities.

To get the angle between them, we simply use the coordinates of the two vectors to determine the angle between them.  

90 + 45 = 135°

from the cosine rule we have

c^{2} = a^{2} + b^{2} - 2abcosθ

c^{2} = 6^{2} +5^{2} - 2 ×6×5×cos 135

c^{2} = 103.426

c = \sqrt{103.426}

c = 10.17 m/hr

6 0
3 years ago
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