All categories

3 years ago

Directions: Select the correct answer from each drop-down menu.

Biology

1 answer:

vladimir1956 [14]3 years ago

4 0

Answer:

The main structural component of plant cell walls is cellulose which is a type of carbohydrate made up of a long chain of glucose molecules (a polysaccharide).

Explanation:

The plant cell walls are composed of cellulose, which is a structural carbohydrate made up of a long chain of glucose molecules (β linked D-glucose units). It is a polysaccharide like starch, but the starch molecule is flexible and the cellulose molecule is rigid. Each of these polysaccharide chains is connected together by hydrogen bonds. Microfibrils are formed by arranging some of these polysaccharide chains in parallel arrays. Due to the presence of hydrogen bonds, the microfibrils are extremely tough and inflexible. This property of cellulose provides strength and rigidity to the plant cell walls.

You might be interested in

. While Carl Linnaeus catalogued nearly all known organisms of his day, which major group of organisms did he not account for in

Blababa [14]

Answer:

Single-cell organisms

Explanation:

In 1735, Linnaeus introduced a classification system with only two kingdoms: animals and plants. Linnaeus published this system for naming, ranking, and classifying organisms in the book "Systema Naturae". In the epoch that Linnaeus created this system, single-cell organisms such as bacteria and protists were almost unknown. In 1866, E. Haeckel added a category including both bacteria and protozoa, thereby adding a category formed by single-cell organisms (different from animals and plants). During the 1900-1920 period, bacteria were classified as a separated kingdom named 'prokaryotes'. The current three-domain classification system was introduced by C. Woese in 1990. In this system, all forms of life are divided into three different domains: archaea, bacteria, and eukaryote domains (this last composed of protists, fungi, plants and animals).

6 0

2 years ago

A group of nursing students are reviewing information about expectorants. the students demonstrate understanding when they ident

GarryVolchara [31]

<span>The group of nursing students show their understanding of expectorants when they are able to identify the medication called guaifenesin. Guaifenesin is sold under the brand name Robitussin. Guaifenesin, an expectorant, is used in Robitussin specifically to relieve a person's cough and chest congestion.</span>

3 0

3 years ago

Need help with this question for a grade

Amanda [17]

I would say the first one a comet. :)

5 0

3 years ago

In 1985 a biologist counted 750 pine trees in a 250 hectare forest. Using similar counting techniques, the biologist counted 1,2

Alisiya [41]

Answer:

Suppose that we have a given function f(x)

The average rate of change of the function between two values x₁ and x₂ is given by:

$r = \frac{f(x_2) - f(x_1)}{x_2 - x_1}$

a) We want to find the average (rate) of change on the size of population from 1985 to 1995.

We have that:

f(1985) = 750

f(1995) = 1500

Then we have:

$r = \frac{1500 - 750}{1995 - 1985} = 750/10 = 75$

This means that the population of trees increases, in average, at a rate of 75 trees per year.

b) What is the density of trees each year that they were counted?

This will be equal to the quotient between the number of trees and the area.

1985: number of trees = 750 pines

area = 250 ha

Then the density is:

D(1985) = (750 pines)/(250 ha) = 3 pines/ha

So 1985, there were 3 pines per hectare.

1990: number of trees = 1250 pines

area = 250 ha

Then the density is:

D(1990) = (1250 pines)/(250 ha) = 5 pines/ha

1995: number of trees = 1500 pines

area = 250 ha

The density is:

D(1995) = (1500 pines)/(250 ha) = 6 pines/ha

3) now we want to get the average change between 1985 and 1995 in the density, this will be:

$r = \frac{D(1995) - D(1885)}{1995 - 1985} = \frac{6 pines/ha - 3pines/ha}{10} = 0.3 pines/ha$

So, on average, each year the number of pines per hectare increases by 0.3

7 0

3 years ago

What is the first step in the treatment process for addiction where the addiction is systematically and safely withdrawn?

solniwko [45]

Answer:

Medical Detoxification

Explanation:

Detox or detoxification is the process of safely and systematically withdrawing from a substance such as drugs or alcohol. For many, it’s an important first step in recovery, allowing the body to withdraw from potentially dangerous substances without risking hospitalization.

Many drugs have significant withdrawal symptoms once you quit using them, you tend to experiencing considerable discomfort and pain. Without proper medical attention, these withdrawal symptoms can become dangerous to your health and even become life‐threatening.

Objectives of Detoxification include

1. Evaluation‐the testing of substances in the bloodstream, their concentrations and any co‐occurring mental or physical conditions that may accompany substance abuse as well as other medical and social assessments.

2. Stabilization‐assisting patients through the withdrawal process towards a stable and substance‐ free state.

3. Fostering Entry into Treatment‐preparing clients to enter formal treatment and providing encouragement and support.

8 0

3 years ago