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DedPeter [7]
2 years ago
11

Which of the following statements about comets is true? PLZ HLEP ASAP

Biology
1 answer:
erastova [34]2 years ago
5 0

Answer:

Answer choice B.

Explanation:

Comets are usually made up of ice, dust, and gas, meaning that options A and D are wrong. Also, as a comet approaches the sun, its particles heat up so quickly that they don't have time to become liquid; they turn straight from solid to gas. This makes them very visible when they come near the sun. Therefore, the correct answer is B. Hope this helps!

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List the three scientific principles of sustainability and give an example of each
uysha [10]
The three scientific principles of sustainability are: (1) dependence on solar energy, (2) Biodiversity, and (3) chemical cycling.

dependence on solar energy - the energy imparted to the earth system by the sun. The sun warms the planet and provides energy that plants use to produce nutrients. The sun also powers indirect forms of solar energy such as wind and flowing water.

biodiversity -
4 0
2 years ago
Match each organism with its phylum Pines Ephedra Palm-like plants Trees with fan-shaped leaves A. Gnetophyta B. Ginkgophyta C.
solong [7]

Answer:

Ginkgophyta

Explanation:

Gymnosperms are cone-bearing trees or Woody plants, which do not different greatly in their structure from the Woody angiosperms. Gymnosperms do not produce flowers but as seed plants that bear their seeds on scale-like leaves which are arranged spirally to form cones. The seeds are termed naked seeds because they are exposed to the air on the surfaces of the cone scales.

Gymnpsperms are grouped into four major divisions namely:

*Ginkgophyta

*Cycadophyta

*Corniferophyta

*Gnetophyta

1)DIVISION GINKGOPHYTA:The ginkgo tree cared maiden hair is the only surviving member of this division. It is found in the Orient(China and Japan) where it is cultivated as an ornamental tree because of the fan-like leaves. The leaves are *fan-shaped* with long petrioles.

2)DIVISION CYCADOPHYTA:The cycads abound in the tropics, mainly as ornamental plants. They are *palm tree-like* plants with a crowded crown of palm fronds.The leaves of Cuba's are deep green,waxy with large petioles.

DIVISION CONIFEROPHYTA:This is the largest group of Gymnosperms as it includes some of most economically exploited plants such as *pines* and Jupiter's. The pine tree is important as Christmas tree and conifers are generally important in the production of wood and paper

DIVISION GNETOPHYTA:This is the group of very unique Gymnosperms made up of three genera:Gnetum,*Ephedra* and Welwitschia.

Ephedra is a profusely branched shrub found in desert regions. It has whorl-like, scale-like, or needle -like leaves and jointed stem.

Hence, matching each with its phylum, we have:

Gingkophyta:Fan-shaped leaves

Cycadophyta-Palm-like leaves

Coniferophyta:Pine

Gnetophyta:Ephedra

5 0
3 years ago
What is the reaction needed to remove a glucose molecule from a polysaccharide, 100 glucose molecues long
vaieri [72.5K]

The reaction needed to remove glucose molecule from a polysaccharide is hydrolysis.

Glucose is a type of monosaccharide which is used in the body for energy.

These monosaccharides such as:

  • Glucose,
  • Fructose and
  • Galactose;

can combine together to form a larger molecule of sugar known as polysaccharides in a reaction called condensation reaction.

Examples of polysaccharides are

  • Chitin
  • Cellulose
  • Start
  • Inulin

These polysaccharides can also be broken down to form the various monosaccharides that makes them up.

The hydrolysis of polysaccharides involves the breaking of the glycosidic bonds that hold the monomers of a polysaccharide molecule together.

This leads to the formation of monosaccharides such as glucose.

Learn more here:

brainly.com/question/13183834

4 0
2 years ago
7. Environmental factors that can contribute to our epidemic of obesity include all of the following except? A. portion sizing B
worty [1.4K]
7. Environmental factors that can contribute to our epidemic of obesity include all of the following except?
B. increased sedentary <span>lifestyles</span>
10. What are some external influences that may lead a person to be at risk for anorexia?
B. our society's cultural reinforcement to be thin
5 0
3 years ago
Read 2 more answers
Help!!!!! Please!!!!!
muminat

the first one is a mollusca

3 0
3 years ago
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