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Black_prince [1.1K]
3 years ago
5

What is the structure of a stem

Biology
1 answer:
erica [24]3 years ago
3 0
Vascular tissue composed of xylem<span> (red) and </span>phloem<span> tissue (green, between the</span>xylem<span> and </span>cortex<span>) surrounds the pith. Collenchyma cells are elongated cells with unevenly-thickened walls . They provide structural support, mainly to the stem and leaves.</span>
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Random Q: but is Honors Biology hard ? Do you think it’s an easy A ? Can you give me an example of what they do ?
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What are two reactants needed for cellular respiration?
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Oxygen and glucose are need for cellular respiration
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Here you go! Good Luck.
Goshia [24]

Answer:

The direction the blood takes through the circulatory system is important because it makes sure that the nutrients and blood gets to every organ and vein in our body. the direction the blood flows is this. Systemic circulation carries oxygenated blood from the left ventricle, through the arteries, to the capillaries in the tissues of the body. From the tissue capillaries, the deoxygenated blood returns through a system of veins to the right atrium of the heart. so we can be the living breathing people we are today.

Explanation:

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3 years ago
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A sample of rock is found to contain 200 grams of a parent isotope.how many grams of the parent isotope will remain after one ha
emmasim [6.3K]

Answer: 100 grams of the parent isotope will remain after one half life.

Explanation:

Mass of the isotope present at initial stage = N_o=200 g

The mass of the parent isotope left after the time ,t=N

Time taken by the samle ,t = t_{\frac{1}{2}}

The half life of the sample :t_{\frac{1}{2}}

N=N_o\times e^{-\lambda t}

\lambda =\frac{0.693}{t_{\frac{1}{2}}}

\ln[N]=ln[N^o]-\frac{0.693}{t_{\frac{1}{2}}}\times t_{\frac{1}{2}}

2=\frac{[N_o]}{[N]}

[N]=\frac{N_o}{2}=\frac{200 g}{2}=100 g

100 grams of the parent isotope will remain after one half life.

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3 years ago
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Describe the plate motions along the Himalayan Mountains. Do you think these mountains are getting larger, smaller, or staying t
artcher [175]
<h2>Himalayas </h2>

Explanation:

  • Once, all the world’s landmass was connected, forming one super-continent known as Pangea
  • About 200 million years ago, tectonic forces broke apart this giant continent into pieces, eventually forming the continents that are known today
  • As convection currents worked independently on the plates associated with these new continental pieces, the plates and their respective continents began to drift across the globe to their present-day geographical locations
  • Eighty million years ago, India was approximately 6400 km south of the Eurasian plate, separating the two was the Tethys Sea
  • The Indo-Australian tectonic plate – containing the continent of Australia, the Indian subcontinent, and surrounding ocean – was pushed northward by the convection currents generated in the inner mantle
  • For millions of years, India made its way across the sea toward the Eurasian plate
  • As India approached Asia, around 40 million years ago, the Tethys Sea began to shrink and its seabed slowly pushed upwards
  • The Tethys Sea disappeared completely around 20 million years ago and sediments rising from its seabed formed a mountain range
  • When India and Tibet collided, instead of descending with the plate, the relatively light sedimentary and metamorphic rock that makes up the subcontinent of India pushed against Tibet, forcing it upwards, and created a massive mountain fold, The Himalayas
  • This process hasn’t stopped, the Indo-Australian plate is still moving toward Eurasia, still pushing Tibet upwards
  • The Himalayas continue to rise by an average of 2 cm each year and the highest mountains are only getting higher

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