BIOLOGY HIGH SCHOOL

Which group of chordates does not possess true backbones? A. Crocodilians
B. Lampreys
C. Birds
D. Frogs and toads

Would it be A.?

Answers

Answer 1
Answer:
No. Crocodilians are reptiles. and they are vertebrates, meaning they have a backbone. The answer is Lamprey.
Answer 2
Answer:

it would be the lampreys because  they do have a backbone

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_____ fats or lipids form animal body fat that is used for stored energy and insulation

Answers

Saturated fats or lipids form animal body fat that is used for stored energy and insulation. 

Match the following carbohydrate molecules with the class of molecule that they belong to:Molecules: (I) Glucose; (II) Starch; (III) Sucrose


Classes:

A) Polysaccharides
B) Disaccharides
C) Monosaccharides

Answers


(I) Glucose; is C
(II) Starch; A
(III) Sucrose B

A) Polysaccharides
B) Disaccharides
C) Monosaccharides

Monosaccharide, disaccharides, and polysaccharides are the three major categories of molecules in Carbohydrates. 

Monosaccharides, known as simple sugar, is the simplest form of carbohydrates. Its basic molecular formula is CH2O. Monosaccharides are glucose, fructose, and galactose. Its primary function is to be the source of energy of living organisms. It is also the primary requirement for the formation of disaccharides and polysaccharides.

Disaccharides are formed when two monosaccharides are bonded together through a covalent bond. Common Dissaccharides are sucrose  (glucose+fructose) or table sugar, maltose (glucose+glucose), and lactose (glucose+galactose). Its primary function is to provide nutrition for monosaccharides. Sugar in food is mostly dissaccharides.

Polysaccharides are formed when another monosaccharides is bonded to the disaccharides. This bond is called glycosidic bond. Two major polysaccharides are starch and glycogen. Starch is made by plants while glycogen is made by animals. Polysaccharides' major function is to immediately release energy from its storage. When glucose is consumed, some of them are stored and will only be released when the body needs it to satisfy the body's immediate need of energy.

Final answer:

Glucose is a Monosaccharide, Starch is a Polysaccharide, and Sucrose is a Disaccharide. Monosaccharides are simple sugars, Disaccharides are two sugar molecules, and Polysaccharides are complex carbohydrates.

Explanation:

The carbohydrate molecules belong to the following classes:

  • (I) Glucose belongs to the class of Monosaccharides.
  • (II) Starch belongs to the class of Polysaccharides.
  • (III) Sucrose belongs to the class of Disaccharides.

To explain, Monosaccharides are the simplest form of carbohydrates, such as glucose. Disaccharides are two monosaccharide molecules linked together, in this case, sucrose is composed of glucose and fructose. Polysaccharides are complex carbohydrates, made of many sugar units - starch is one such example.

Learn more about Carbohydrate Classification here:

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Which of the following statements is true?A) cool air is less dense than warm air.
B) Sound does not require a medium for travel.
C) Magnetism is caused by the spinning motion of electrons.
D) Electricity flows from positive to negative areas.

Answers

The statement that is true is C.

Answer:

Magnetism is caused by the spinning motion of electrons. is true :)

Explanation:

Which statements best describe the atoms of the gas neon? Check all that apply. They move at high speeds. They move freely in all directions. They vibrate in place. They move constantly. They are far apart.

Answers

The statement that describes the gas of neon is

 1. They are far apart.
2. They move constantly.
3. They move freely in all directions.
4. They move at high speed. Neon is termed as a chemical element. It is a noble gas.

It is odorless, colorless, inert monatomic gas when under standard condition. Neon is the second of the rare gases to be discovered. The second lightest inert gas.

Answer:

B

Explanation:

I took quiz on edge

A student conducted an experiment to test whether talking to plants would help them to grow faster. The student talked to one group of plants and hand watered them. The student did not talk to the other group of plants and used sprinklers. After three weeks, the plants that were spoken to showed much more growth than the plants that were not. Based on the results of this experiment, which is the best conclusion? a)Talking to plants may or may not help plants grow faster because three weeks is not enough time to tell.
B)Talking to plants may or may not help plants grow faster because the amount of water given was likely different for each group.
c)Talking to plants does not help plants grow faster because the experiment did not involve enough groups of plants to determine this.
D)Talking to plants does help plants grow faster because those plants showed more growth.


which is the best answer to pick hurry have a short amount of time on this test

Answers

Answer:

The correct answer will be option-B.

Explanation:

The student performed the experiment to study the effect of talking to plants on the growth of plants. He wanted to study "talking as an experimental variable".

While experiment he divided the samples into control group as well as the experimental group but he mixed the other variables like watering the plants using various methods-directly or with sprinkles in different amount.

This mixing of variables will cause interference with the conclusion as one will not be able to suggest that the growth pattern in plants is the result of the talking or watering. Also, the amount of water as well as mode of providing water differed in the experimental group.

Thus, Option-B is the correct answer.
The answer is D. Good luck on your test!

Name two circumstances which can result in genetic drift having a significant impact on a population. Explain each.

Answers

Genetic drift can have a significant impact on a population under various circumstances. Here are two common scenarios and their explanations:

1. **Founder Effect:** The founder effect occurs when a small group of individuals from a larger population migrates or colonizes a new, isolated area. These founding individuals have a limited genetic diversity compared to the original population. As a result, the genetic makeup of the new population is determined by the alleles carried by the founding individuals. Any rare alleles present in the founders may become more common in the new population, while other alleles may be lost. Over generations, this can lead to a significant change in allele frequencies within the population.

2. **Population Bottleneck:** A population bottleneck occurs when a significant portion of a population is suddenly and drastically reduced in size, often due to a natural disaster, disease outbreak, or human intervention. The surviving individuals have a limited genetic diversity, as they represent only a fraction of the original population. As a result, genetic drift can have a pronounced effect on this smaller population. Alleles that were once rare may become fixed (meaning all individuals in the population carry the same allele), and genetic diversity is greatly reduced. This can increase the risk of genetic disorders and reduce the population's ability to adapt to environmental changes.

In both scenarios, genetic drift is driven by chance events rather than natural selection. Over time, the effects of genetic drift can lead to a loss of genetic diversity and potentially impact the population's long-term survival and ability to adapt to changing conditions.
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