Can someone please help with number 38

Answer:

C. Industrial Revolution

Explanation:

Took the test ;)

Also, the new machines in the industrial revolution helped human health and of course, advanced technology but the machines and the mining harmed the environment.

Answer:

Below

Explanation:

Vedantu Scholarship Admission Test is LIVE!

REGISTER FOR FREE

filledbookmark

USE APP

Sign in

Questions & Answers

CBSE

Biology

Grade 11

Cell wall

Answer

NCERT Solutions

Popular Textbook Solutions

CBSE

ICSE

State Boards

Competitive Exams

Important Concepts

Other

Outermost layer of the cell wall is

(A)Plasmalemma

(B)Secondary wall

(C)Middle lamella

(D)Primary wall

VerifiedVerified

152.7k+ views

1 likes

Hint: The wall which is present at the outermost of the cell wall acts as a glue between the different cells. . The secondary wall is not present in every cell, it is present in few cells that alter the growth of the primary wall.

Complete answer:

A cell wall is an outer structural layer present in only some types of cells, just outside the cell membrane. It is usually tough, flexible, and sometimes rigid. The cell wall is mostly composed of two layers and sometimes three layers too. The layers of the Cell wall are as follows-

- The primary cell wall is generally a flexible thin, and an extensible layer formed while the cell is growing i.e not fully developed. It is usually made up of cellulose and it is often permeable too.

-The middle lamella, a layer rich in pectins. It is the outermost layer that forms the interface between adjacent plant cells and glues them together.

-The secondary cell wall, if present, is a thick layer formed inside the primary cell wall after the cell is mature. it's not found in all cell types.

Additional Information: The cell wall is majorly composed of the cellulose microfibrils that are linked via hemicellulosic tethers to form the cellulose-hemicellulose network, which is embedded in the pectin matrix. The most common hemicellulose present in the primary cell wall is xyloglucan.

The outer part of the primary cell wall of the plant epidermis is mostly covered with the cutin and wax, forming a permeability barrier known as the plant cuticle.

Secondary cell walls contain a wide range of additional compounds that helps to enhance and modify their mechanical properties and permeability. The major polymers that make up wood (largely secondary cell walls) include cellulose, 35-50% .xylan, 20-35%, a type of hemicellulose, and lignin, 10-25%.

The cell wall which is the farthest from the plasma membrane in plants is the primary cell wall.

A Cell wall may be defined as a specialized form of the extracellular matrix that surrounds every cell of a plant. It is made up of cellulose.

The primary cell wall is the outermost cell wall in the plants, while the secondary cell wall is the innermost cell wall in the plant cell.

The secondary cell wall is located near the plasma membrane, while the primary cell wall is located farthest from the plasma membrane.

Therefore, the cell wall which is the farthest from the plasma membrane in plants is the primary cell wall.

To learn more about the Cell wall, refer to the link;

https://brainly.com/question/2622341

#SPJ4

Answer:

i put makeup of my dog and on my cow i  love to jump over the sun for joy

Explanation:

Answer:

Some penguins may live in the same location that doesn't mean they have to be the same species of a penguin. They may not be attracted to other species that live there.

Explanation:

same as above

The following statement best explain the pattern of seen on the gel electrophoresis.

Gel electrophoresis is a laboratory technique that is used to separate combinations of DNA, RNA, or proteins base on their molecular size. In gel electrophoresis, the molecules to be separated are put and push forward by an electrical field through gel that that have small pores.

Therefore, The following statement best explain the pattern of seen on the gel electrophoresis.

Learn more about gel electrophoresis here.

https://brainly.com/question/6885687

Answer: both 1 and 2

Explanation: common sense

Both 1 and 2 are a characteristic of all mammals.

Characteristics of Mammals are:

Thus,  Both 1 and 2 are a characteristic of all mammals.

To learn more about Mammals click here:

https://brainly.com/question/10194338

A total lunar eclipse has a reddish colour, The moon moves between Earth and the Sun during a solar eclipse, and A lunar eclipse occurs during a full moon.

Scientists have examined eclipses since age-old times. Aristotle observed that the Earth's shadow has a circular form as it moves across the moon. He declared that this must mean the Earth was round.

Thus, the above-mentioned statements about the eclipses are true.

To learn more about eclipse click here:

https://brainly.com/question/25105283

Answer:

Rainwater is very important in my area, we use it for crops, animals and for everyday essentials. It's collected in jars and kept stored, it can be filter then boiled to extract any bacteria. Then I usually sit it outside in the sun to grab the suns energy. This saves me a lot of money on utilities like my water bill for example. It's safe for everyone and poses no threat to the environment.

Explanation:

This is a natural alternative for anyone who loves nature and alkaline water

Answer:

Blue crab is an important resource in my region. It is harvested in Chesapeake Bay. People in my region have been eating blue crabs for hundreds of years. Blue crabs are usually harvested in traps called crab pots. Most crabs are harvested commercially, but recreational crabbing is also important. Crab harvesting in Chesapeake Bay is regulated by the states of Maryland and Virginia, and special licenses are required. Limits are placed on the number of crab pots and the sizes of crabs that can be kept. Even though regulations are in place to protect the crabs, their numbers are declining due to deteriorating water quality in Chesapeake Bay. The crabs require additional protection, but too many restrictions could put people out of work because blue crabs are a popular, traditional food in the region, and thousands of people make a living from crab fishing. The natural resources management of the crabs is inadequate because the crabs continue to be harvested in an unsustainable way.

Explanation:

EDMENTUM ANSWER

Answer:

Coral snake bites can be extremely painful and can cause muscular paralysis. The coral snake's venom is one of the most potent venoms in the animal world because it contains powerful neurotoxins. The neurotoxins are responsible for the rapid paralysis and respiratory failure in the coral snake's smaller prey.

Explanation:

Since their are more sodium ions outside the cell at test, if a cell becomes freely permeable to sodium ions and is not regulated, the membrane potential will be positive.

The membrane potential is the potential difference across a neuronal membrane due to the difference in the concentration gradient of oppositely charged ions.

At rest, the inside of the membrane is negative while outside is positive due to more sodium ions being outside the cell.

Therefore, if a cell becomes freely permeable to sodium ions and is not regulated, the membrane potential will be positive.

Learn more about at membrane potential at: https://brainly.com/question/6705448

Answer:

It helps to ascertain the number of living beings on earth.

Explanation:

More than one million of species of plants and animals have been discovered and classified so far. It aims to classify the living organisms. Millions of organisms are classified scientifically in categories, which helps to have a better understanding.

Answer:

RNA (referred to as a ribozyme)

Explanation:

Answer:

Point mutation

Explanation:

Since it does not alter the amino acid, it would be a point mutation (unless if it did change the amino acid, it would be a frameshift mutation).

Explanation:

carbon, hydrogen, nitrogen, oxygen, sulphur and phosphorus

Answer:

Almost 99% of the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium.

Explanation:

Answer: Plants get water from the soil their roots are embedded in.

Explanation: Photosynthesis can be defined as the process by which the the autotrophs make food with the help of carbon dioxide and water.Water provides electrons,these electrons are energized by sunlight and used to make ATP.The plants get water from the soil. The water in the soil is absorbed by the roots of the plant that is transported to the leaves for photosynthesis.hence, the answer is soil.

Answer:

it's b

Explanation:

they got used to it all the ones that couldnt handle it died in the generation before

a.

In soil erosion, the soil is carried away from by the wind or water from the top layer of the ground. Soil formation is making soil. It can be by the deposition of the soil from water or wind

Answer:

-if I'm not wrong the technique is used to produce the bacteria cell is DNA cloning because after a ligation, the next step is to transfer the DNA into bacteria in a process called transformation.

-The organic compounds scientist used to cut DNA is enzymes.

-the possible result would be the transformations made and selection of the bacteria.

Answer:

d.

Explanation:

You need a small dose of the disease so your body can fight it and become immune.

Answer:

D

Explanation:

Answer:

nice English and I'm good morning

Answer:

The diversity in prokaryotes exists on the cellular level and is not visible to the n*ked eye.

Answer:

there would be less jackrabbits, more sagebrus, and the coyotes would have less food leading them to death

Explanation:

what i said

The most likely consequence of a herbicide that selectively inhibits the development of antheridia would be the reproduction of female plants only.

The antheridia are haploid reproductive structures that produce male gametes in some types of plants.

The antheridia can generate a special type of biflagellate sperm (male gametes) required during se_xual reproduction.

Conversely, archegonia is a structure that produces a single egg, i.e., the ovum or female gamete.

Learn more about antheridia here:

https://brainly.com/question/1286197

This is called codominance

The result of a mutation within a start codon is the non-start of the protein translation, whereas a mutation in the stop codon will long the length of the protein.

Transcription refers to the process by which a fragment of DNA is used as a template to create an RNA molecule, usually a messenger RNA.

Subsequently, this mRNA sequence can be used to create a protein by a process called translation.

The triplets of nucleotides (codons) in the mRNA are read by the ribosomes during translation, thereby a mutation in the start codon would produce a nonfunctional mRNA.

Moreover, a mutation in the stop codon will long the length of the resulting protein sequence.

Learn more about translation here:

https://brainly.com/question/25703686

Answer:

Aerobic respiration is far more energy-efficient than anaerobic respiration. Aerobic processes produce up to 38 ATP per glucose. Anaerobic processes yield only 2 ATP per glucose

Answer:

the first one would be DNA replication.

the second one would be Segregation

the third is Cytokinesis

and the last should be Binary Fission

Answer:

Green algae and Red algae.

Explanation:

Answer:

Red algae and green algae are included in the supergroup Archaeplastida. It was from a common ancestor of these protists that the land plants evolved, since their closest relatives are found in this group. What is a protist as in the protist kingdom?

Explanation:

Here the experiment is on heart rate of a person

Controlled Variable:

Explanation:

Independent Variable:

Explanation:

=================================================================