The cassava is an important food crop for people living in sub-Saharan Africa. In the 1970s, mealybug infestations destroyed harvests and people starved. A researcher who studied the mealybug in its native environment discovered a parasitoid wasp that was a natural predator. After extensive testing to determine safety, the parasitoid wasp was introduced into the sub-Saharan region with tremendous effect controlling the mealybug throughout most of Africa. This approach represented a form of

Answers

Answer 1

Answer:

Biological control.

Explanation:

The introduction of parasitoid wasp into the sub-Saharan region in order to control the population of mealybug throughout most of Africa. This approach represented a form of biological control because one harmful organism is controlled with the help of other living organisms that feed on them. This method is environmental friendly and good as compared to chemical method of removing harmful insects.


Related Questions

state the general name for plants that live in,and are adapted for,dry conditions.​

Answers

Answer:

Succulents

Explanation:

They have a thick waxy cuticle so that water vapour does not escape easily

Some have thornes so they are not eaten by animals

There roots are very wide and shallow so that they can absorb water from the surface quickly after it rains

Their stomata open at night so that too much water vapour cannot diffuse into the air

Answer:

Plants that are adapted to very dry environments are called xerophytes

Explanation:

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The number of mosquitoes at the beginning of the summer was 4,000. There were 500 born and 550 died. What is the growth rate of the mosquitos population? Looking at the birth and deaths does your growth rate makes sense. Explain why or why not.


Answer the following with the growth rate formula: r=(b-d)/N


Please help quick 50 points

Answers

Answer:

-50

Explanation:

500-550

Fatty acids are a component of what type of macromolecule?

Answers

Answer:

Lipids

Explanation:

read textbook

Fatty acids are a component of lipids macromolecules.

Fatty acids and lipids

Fatty acids are a component of lipids. Lipids are a diverse group of macromolecules that include fats, oils, phospholipids, and sterols. Fatty acids are the building blocks of lipids.

They are long hydrocarbon chains with a carboxyl group at one end. Fatty acids can be saturated (no double bonds) or unsaturated (one or more double bonds).

When combined with glycerol, fatty acids form triglycerides, the most common type of lipid used for energy storage in organisms.

More on fatty acids can be found here: https://brainly.com/question/31752492

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What is the difference between a hepatic duct and a hepatic vein?​

Answers

Explanation:

The liver is connected to two large blood vessels, the hepatic artery and the portal vein. The hepatic artery carries blood from the aorta to the liver, whereas the portal vein carries blood containing the digested nutrients from the entire gastrointestinal tract, and also from the spleen and pancreas to the liver.

The hepatic veins carry oxygen-depleted blood from the liver to the inferior vena cava. They also transport blood that has been drained from the colon, pancreas, small intestine, and the stomach, and cleaned by the liver. These veins originate from the core vein of the liver lobule, but they do not have any valves.
The hepatic duck: A duct that carries bile from the liver into the common bile duct which conveys it to the duodenum (the upper part of the small intestine).

How much has the rate of surface temperature been in the last 50 years?​

Answers

Answer:

The global average surface temperature rose to  0.6 to 0.9 degrees Celsius ((1.1 to 1.6° F)) between 1906 and 2005, and the rate of temperature increase has nearly doubled in the last 50 years!

44. A food handler does NOT need to worry about time and temperature control when handling which food?
Steamed rice
Cooked beans
Grilled steak
Warmed tortillas
QUESTIONZANSY

Answers

Steamed rice or beans.

An object is placed at 0 on a number line. It moves 3 units to the right, then 4 units to the left, and then 6 units to the right. What is the displacement of the object?

Answers

Answer:

5

Explanation:

Distance is how far something goes and Displacement is how far it is from 0 or from the starting point. Additionally, displacement is a vector so it has a direction, in this case, left or right. To make this shorter let's just find displacement. So you're at 0 and you go 3 units to the right and so you're at positive 3 on the line. Next, you move 4 units to the left so now you're at -1. Finally, you move 6 units to the right and now you're at postive 5. Now you're +5 units away from 0 and so +5 is your displacement (5 units to the right is also correct)

Answer: +5 units or 5 units to the right (as long as it has a sign or a direction it's correct)

5
+5 units or 5 units to the right

how does secondary succession differ from primary succession? it begins on bare rock or land, it begins where no plants have grown, lichens and mosses form soil first, soil nutrients are already in place

Answers

in georgia or in the crib

Answer:

In primary succession, newly exposed or newly formed rock is colonized by living things for the first time. In secondary succession, an area that was previously occupied by living things is disturbed, then re-colonized following the disturbance.

Which parts of the biodome contain carbon?

Answers

Carbon is stored in the lithosphere in both inorganic and organic forms. Inorganic deposits of carbon in the lithosphere include fossil fuels like coal, oil, and natural gas, oil shale, and carbonate based sedimentary deposits like limestone.


Hood this helps

Why do sex-linked traits follow different patterns of inheritance than other
traits?

Answers

It is because the males are heterozygous in terms of sex chromosome. They carry one copy of the X chromosome and one copy of the Y chromosome. So, only a single copy of allele is enough to produce the phenotype.

What is the function of the organelles that are labeled F?

Answers

The organelle labeled 'F' in the given diagram is Endoplasmic reticulum. The main function ER is to move proteins and other substances through the

Which example of a food production method is sustainable?
A. Planting a monoculture crop over large areas of land
B. Using no-till farming practices to decrease erosion
C. Using enough pesticides to reduce bee populations
D. Irrigating soil until it becomes waterlogged

Answers

The answer for this one is B. I hope I help! :)

Responda con verdadero (V) o falso (F), según corresponda. En caso de falso, justifique su respuesta. Todas las células poseen pared celular Las células procariotas se originaron hace 1.500 millones de años aproximadamente_____ Los centriolos son organelas cilíndricas, formadas por proteínas, que intervienen en la división celular____ El ADN determina las características de un organismo____ En las mitocondrias se produce la digestión celular_____ En la definición de célula, la palabra estructural, hace referencia a cómo funciona la célula_____ La palabra Eucariota quiere decir "verdadero núcleo"____

Answers

Answer:

Falso

Falso.

Cierto

Cierto

Falso

Falso

Cierto.

Explicación:

Todas las células no tenían pared celular. Sabemos que la célula animal es un tipo de célula que solo tiene membrana celular. Las células procariotas se originaron hace aproximadamente 3,5 mil millones de años. Los centríolos son orgánulos cilíndricos, formados por proteínas, que contribuyen en la división celular. El ADN determina las características de un organismo porque el ADN tiene toda la información sobre los organismos. La digestión celular no ocurrió en las mitocondrias. El lugar de la digestión celular son los lisosomas. En la definición de celda, la palabra estructural, se refiere a la composición y forma de la celda. La palabra eucariota significa "núcleo verdadero" y núcleo verdadero significa que la membrana rodea al núcleo.

36. Mitosis requires the chromosome to be replicated into______ copies.
a. 2
b. 6
c. 1

Answers

Answer:

Option a. "2"

Explanation:

Answer:

Mitosis requires the chromosome to be replicated into 2 copies.

option a is the answer

Explanation:

The cell separates the copied chromosomes to form two full sets (mitosis) and the cell divides into two new cells (cytokinesis). The period between cell divisions is known as 'interphase'.The genome is composed of a number of chromosomes—complexes of tightly coiled DNA that contain genetic information vital for proper cell function. Because each resultant daughter cell should be genetically identical to the parent cell, the parent cell must make a copy of each chromosome before mitosis

Which of these is not a type of muscle tissue?
a smooth
b. rough
C.skeletal
D. cardiac

Answers

Answer:

a

Explanation:

BEST ANSWER IS

ccccccccccccc. skeletal

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what does cytoplasm do

Answers

Answer: What does cytoplasm do

Explanation:The cytoplasm holds the components of the cell and protects them from damage. It stores the molecules required for cellular processes and is also givies the cell its shape.

Answer:

The cytoplasm is responsible for holding the components of the cell and protects them from damage. It stores the molecules required for cellular processes and is also responsible for giving the cell its shape.

The 3 major functions of cytoplasm:

The cytoplasm support and suspend organelles and cellular molecules. Many cellular processes also occur in the cytoplasm, such as protein synthesis, the first stage of cellular respiration (known as glycolysis), mitosis, and meiosis. The cytoplasm helps to move materials, such as hormones, around the cell and also dissolves cellular waste.

Que son los combutibles fósiles y cuales son los que dañan más al medio ambiente?

Answers

Answer:

Mining, drilling, and burning dirty energy are harming the environment and our health. Here’s everything you need to know about fossil fuels, and why we need to embrace a clean energy future.

if you don't know English u can translate

The phenotype frequency in a populatin changews after each generation which would most likely be cause this

Answers

The answer is: Competition between organisms.

The illustration below shows the steps of meiosis
What is the step that is labeled D?

Answers

Answer:

Anaphase

Explanation:

Answer: Metaphase l

Explanation: Homologous chromosomes line up in double file

How is a scientific law different from a scientific theoryWhat is the difference between inorganic and organic compounds?

Answers

Answer:

A scientific law predicts the results of certain initial conditions. It might predict your unborn child’s possible hair colors, or how far a baseball travels when launched at a certain angle. In contrast, a theory tries to provide the most logical explanation about why things happen as they do. Organic molecules mainly have covalent bonds whereas, in inorganic molecules, there are covalent and ionic bonds. • Inorganic molecules cannot form long chained polymers as organic molecules do.

Explanation:

Can someone help me with this for a brainly?

Answers

Reproduction is the second ability.

Which definition is the best for “semipermeable membrane

Answers

Answer: A semi-permeable membrane is that which only allows certain

               substances to pass through.

Answer: A semipermeable membrane is a layer that only certain molecules can pass through. Semipermeable membranes can be both biological and artificial. Artificial semipermeable membranes include a variety of material designed for the purposes of filtration, such as those used in reverse osmosis, which only allow water to pass. The biological membranes of cells are created by two sheets of phospholipid, which contain a lipid tail attached to a polar head. The tail regions of each sheet cluster together, while the heads of the molecules point outward. The polar heads point both outward toward the environment of the cell and inward toward the cytosol. In this way, a hydrophobic region of lipid tails separates the two bodies of solution. This can be seen in the image below.

Explanation: sorry if its too much wording i tried to shorten it as much as possible

The cells of a pineapple plant have 50 chromosomes in their nuclei. How many chromosomes are there in the male nucleus in a pineapple pollen grain?

Answers

Answer:

25 chromosomes

Explanation:

There are two principal types of cells in the organism: Somatic diploid cells (2n) that reproduce by the process of mitosis, and germ cells that are diploid reproductive cells in charge of gamete production. Germ cells divide by mitosis and meiosis. Through the process of mitosis, they originate more sexual cells, but through the process of meiosis, they give place to haploid gametes, called sperm and egg cells, through the gametogenesis process.  

Gametes´destiny is to merge during fecundation, and a new diploid cell called zygote emerges through fertilization. The zygote is a complete cell and suffers successive mitosis to form the new organism.  

Meiosis produces four daughter haploid cells (n) from a diploid germ cell (2n). Each daughter cell is haploid because they have half the number of chromosomes of the original one.

So, in the exposed example

"...cells of a pineapple plant have 50 chromosomes in their nuclei..."

These might be diploid somatic or germ cells. The number of chromosomes, 2n = 50.

Germ cells in plants suffer meiosis and produce gametes.

Gametes of plants are ovocell and pollen grains. Ovocell is the feminine gamete, while the pollen grain is the masculine gamete.

The pollen grain is haploid and its number of chromosomes n = 25.

help me to do this please please​

Answers

Answer:

HELP MEE TOOOOOOO

Explanation:

Digestion
alimentary canal
milk teeth
trachea
peristalic movement
villi
rumen
caecum
liver
salivary amylase
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Which is a characteristic of pseudoscience?

resistance to change
continually changing
involves a step-by-step method
updated by new technology

Answers

Answer:

Resistance to change

Explanation:

Indicators/Characteristics of pseudoscience:

Use of vague, exaggerated, or untestable claimsOver-reliance on confirmation rather than refutationLack of openness to testing by other expertsAbsence of progressPersonalization of issuesMisleading language

What kind of symmetry does the human body plan show? Explain what this means.

Answers

The last type of symmetry is the bilateral symmetry. Bilateral symmetry is when the body plan can be divided along a plane that splits the animal's body into right and left sides that are mirror images of each other. Let's look at this type of symmetry a little more.

complementary strand of DNA?
DNA Strand 1: AATCGGTAC

Answers

Answer:

TTAGCCATG

Explanation:

Deoxyribonucleic acid (DNA) is a double helix molecule made up of two complementary polynucleotide strands oriented antiparallel to each other. Each nucleotide in both DNA strands is composed of a five-carbon sugar (deoxyribose), a phosphate group and a nitrogenous base. In DNA, there are four types of nitrogenous bases: Thymine, Guanine, Adenine and Cytosine (in RNA, Uracil replace Thymine). According to the base-pairing rules, Adenine always pairs with Thymine through two hydrogen bonds, whereas Guanine always pairs with Cytosine through three hydrogen bonds.

Review the chart, which shows the population sizes of three African animals in 1990 and in 2000.

Population Estimates of Animals in Africa in 1990 and in 2000

1990
2000
Lions
100,000
47,000
Cheetahs
50,000
7,500
Zebras
15,000
2,500

Which explanation is best supported by the numbers in the chart?

Answers

Answer:

Population of lions are more than cheetahs and zebras.

Explanation:

The chart provides information about the population sizes of Lions, Cheetah and Zebras. According to this information, population of lions is the greatest as compared to Cheetah and Zebras. This is due to suitable conditions for the lions such as food and shelter etc in that jungle of Africa as well as strong competitor and its aggressive behaviour make them successfully survive and increase its population in the jungle.

TIME REMAINING
59:00
What is natural selection?
O a process that selects variations that help with survival and that spreads the variations to more offspring
a process through which nature selects an individual within a population for extinction
a process that causes all populations to gradually increase in size
O a process that causes random variations to appear in the offspring of every generation

Answers

Answer:

a

a process that selects variations to help with survi al and that spreads the variation to more offspring

Explanation:

the weak don't survive the strong thrive

Refer to Animation: Cell Signaling: Adrenaline Signaling in the Heart Muscle. Adrenaline stimulates an increase in heart rate by binding to: G proteins on the cytosolic face of the plasma membrane. adenylyl cyclase. regulatory regions in genes that code for muscle cell proteins. G protein-coupled receptors on the surface of heart muscle cells. nuclear transport proteins that allow adrenaline to be taken into the nucleus to act as a transcription factor.

Answers

Answer:

The correct answer is ''G-protein coupled receptors on the surface of cardiac muscle cells.''

Explanation:

Adrenaline is a catecholamine whose pharmacological effects occur at alpha and beta adrenergic receptors. The mechanism of action of all beta adrenergic receptors is the activation of a G protein that activates adenylyl cyclase and increases cyclic AMP production. Adrenaline by b-adrenergic stimulus increases the contractile force of the myocardium (positive inotropic action) and increases the frequency in which the myocardium contracts (positive chronotropic action), consequently there is an increase in cardiac work, with a greater demand for oxygen due to the myocardium to be able to contract. Therefore, the blood flow to the heart is indirectly increased, bringing with it a greater supply of oxygen.

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