The introduction of pests in a new geographic region may have devastating consequences on crop yields. Invasive pest species often don't have natural predators or exhibit higher adaptive fitness.
Invasive species represent an important subject of concern in agriculture because they have the potential to drastically reduce crop yields.
Generally, invasive pest species don't have natural predators or exhibit higher adaptive fitness compared to well-established natural pest species.
In consequence, these species (invasive species) may cause considerable harm to crops.
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Which component of blood contains
no nucleus or organelles and carries
oxygen to body tissues?
Answer:
Red Blood Cells
Explanation:
They mainly contain hemoglobin, and no nucleus or organelles, it also carries oxygen to body tissues.
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please help with 13
Answer:
where is the video ? please show
I really need this question answered
Answer:
i don't know how i do ???????????????????
Need urgent help please!!
1.Which is the independent variable
2.Which is the dependent variable.
Answer:
Independent: Volume of Liquid (mL)
Dependent: Mass of Liquid (g)
Explanation:
The independent variable is always on the x-axis and the dependent is always in the y-axis.
___ help the flow of blood from atrium to ventricle. HELPPP
Answer:
the two atrioventricular valves
Which explains why the nuclear membrane breaks down during cell division?
So the cytoplasm can be divided.
So the duplicated chromosomes can be separated into new cells.
So the chromosomes can be replicated.
So it makes it easier for the DNA to be mutated.
Describe the function of the following organelles a. cell (plasma) membrane
b. cytoskeleton
c. cytoplasm
d. nucleus
e. nucleolus
f. Ribosomes
g. endoplasmic reticulum (rough and smooth)
h. vesicle
I. Golgi apparatus
j. lysosome
k. vacuole
l. centrioles (centrosome)
m. Cilia
n. flagella
o. mitochondria
p. chloroplast
q. cell wall
Answer:
the answer is b
Explanation:
Because I'm learning science and I looked at the answer for a while
some scientists predict that if global warming continues over the next few centuries, melting of the polar ice caps will rise the level of the oceans causing some peninsulas to become islands. how might this change eventually affect the species that live on these peninsulas?
Answer:
As global warming causes more snow and ice to melt each summer, the ocean and land that were underneath the ice are exposed at the Earth's surface. Because they are darker in color, the ocean and land absorb more incoming solar radiation, and then release the heat to the atmosphere.
what organisms undergo cellular respiration
Answer:
Cellular respiration takes place in the cells of fungi, animals, and plants.
Explanation:
Notice how these things are all living things. Cellular respiration is the process of turning glucose into ATP. This ATP is used for cellular functions and also to break down more glucose for more ATP. It is kind of like a circular process.
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Zach Corp. pays commissions to its sales staff at the rate of 3% of net sales. Sales staff are not paid salaries but are given monthly advances of $15,000. Advances are charged to commission expense, and reconciliations against commissions are prepared quarterly. Net sales for the year ended March 31 were $15,000,000. The unadjusted balance in the commissions expense account on March 31 was $400,000. March advances were paid on April 3. In its income statement for the year ended March 31, what amount should Zach report as commission expense?
Based on the information given the amount that Zach should report as commission expense is $450,000.
Using this formula
Commission expense=Percentage of net sales× Net sales
Where:
Percentage of net sales=3%
Net sales=$15,000,000
Let plug in the formula
Commission expense=3%×$15,000,000
Commission expense=$450,000
Inconclusion the amount that Zach should report as commission expense is $450,000.
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Is the onion skin composed of one or many cells
Answer:
It is 2 cells I believe
Answer:
onion skin is comprised of many cells that work in unison to create the onion skin and its texture
Explanation:
Match these items .
1 .
scales
pistil and stamen
2 .
egg
cone parts
3 .
mitosis
fungi parts
4 .
hyphae
leaf and spore case
5 .
mold
vegetative reproduction
6 .
flower parts
cell division
7 .
cherry tree
male cell
8 .
sperm
female cell
9 .
without seeds
flowering plant
10 .
fern parts
fungi
3. In 1981, a stray black cat with unusual curled-back ears was adopted by a family in California. Suppose you were the person who owned the first "curl" cat, and wanted to develop it into its own breed. How would you determine whether the allele for curled ears is dominant or recessive? Why does it make a difference for breeders whether an allele for a trait is dominant or recessive?
It is possible to determine whether the allele for curled ears is dominant or recessive by performing a test cross. It is fundamental for breeders because desired traits show differential patterns of inheritance.
In a diploid (2n) organism, a given gene locus exhibit two different variants or forms called 'alleles'.
An individual is homo-zygous when both alleles for a given gene locus are the same, while an individual is heterozygous when alleles are different.
In cases of complete dominance, the expression of the recessive allele is completely masked in heterozygous individuals.
A breeder is a professional who performs genetic crosses between different organisms in order to obtain offspring (eg., plants, animals, etc) with desired phenotypic features.
A test cross is a type of cross that breeders use to determine whether an allele is dominant or recessive (in this case, the allele for curled ears).
In a test cross, the organism that is a carrier of the unidentified allele is crossed with another organism that is believed to be homo-zygous for the recessive trait, and then the proportion of offspring is examined.
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Define viral plaque forming unit .
Answer:
A plaque-forming unit (PFU) is a measure used in virology to describe the number of virus particles capable of forming plaques per unit volume
If each parent has two sets of genes and chromosomes why do their offspring receive only one set from each parent
Answer:
Because we are diploid humans, and we have 2 chromosomes per set. We get one set from our mother, and one from out father. Each of the sets from our parents are haploid (1 ), so together they are a diploid(2) set. I can go into depth more with meiosis if you need.
Explanation:
g persons with the inherited disease familial hypercholesterolemia have very high levels of cholestoral because of
Answer:
a genetic mutation passed on by one or two of their parents.
Explanation:
Sea corals live exclusively in the ocean and are radially symmetrical. They have microscopic stinging barbs that shoot out to immobilize their prey. This allows corals to hunt even while they are stuck to the ocean floor.
What animal phylum do corals belong in?
chordates
mollusks
cnidarians
annelids
Answer:
phylum Cnidaria
Corals, anemones and jellies are related and all classified in the phylum Cnidaria or “stinging needles.” The animals in this group are aquatic, possess stinging cells within their tissues and have a body plan characterized by radial symmetry, which allows all parts of their bodies to be equally receptive and ...
Explanation:
Answer:
A. chordates
Explanation:
describe why rocks found at the bottom of the river are smooth and flat.Please in your own words,My teacher would get mad
The rocks found at the bottom of a river smooth and flat because those are collides with each other.
Explanation:
At the bottom of the river, the rocks which are found are very smooth and the shape of these rocks are flat because the rocks at the bottom collide with each other.
This results in the chipping off parts of the rocks and this results in the surface of the rock to become smooth and becoming flat. Moreover the sand found at the bottom acts as a sand paper creating resistance and smooth-ens the rocks at the bottom of the river.
Abrasion, which is the physical wearing away of a material by friction, is the process that results in the formation of smooth and flat rocks often found at the bottom of rivers.
What is Abrasion?Abrasion is the process of rubbing or scraping away a material, by rubbing against a rough surface or causing friction. This type of mechanical weathering can be brought about by a variety of things, including wind, water, snow, and human action. Rock, metal, plastic and wood are some of the materials that may be subject to abrasion.
This may result in material loss and modification of the appearance and texture of the surface. Natural features such as the smoothness of river boulders or the roundness of pebbles on a beach can also be the result of friction. Sandblasting, grinding and polishing are some examples of industrial abrasive applications.
Therefore, Abrasion, which is the physical wearing away of a material by friction, is the process that results in the formation of smooth and flat rocks often found at the bottom of rivers.
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Would you say the rate of cell growth is increasing or decreasing? cell division
Answer:
i would say ut increases leading to production of larger cells.
Explanation:
Cell size depends on both cell growth and cell division, with a disproportionate increase in the rate of cell growth leading to production of larger cells and a disproportionate increase in the rate of cell division leading to production of many smaller cells.
what is Nuclear Fusion.
Answer: Nuclear Fusion occurs when the nuclear components of an atom combine.
-. What describes the conversion of ADP to ATP?
Answer:
Two processes convert ADP into ATP: 1) substrate-level phosphorylation; and 2) chemiosmosis. Substrate-level phosphorylation occurs in the cytoplasm when an enzyme attaches a third phosphate to the ADP (both ADP and the phosphates are the substrates on which the enzyme acts).
Explanation:
Question 4 I need help with
Cells that do not have a nuclear membrane are called
Convert 63°F to degrees Celsius.
If necessary, round your answer to the nearest tenth of a degree.
Here are the formulas.
5
9
9
F=-C+32
5
c=E(F-32)
+
Answer:
C = 5/9(F - 32)
C = 35
35 = 5/9(F-32)
35 * 9/5 = (F-32)
(F-32) = 63
F = 63 + 32 = 95
how to report an account that keeps posting these links in our answers?
When they answer the questions, there is a flag that appears, if you click on it, you can flag the answer and it reports them.
How can accidental transfer of DNA impact a crime scene investigation? In addition, explain why accidental DNA transfer cannot be used as an excuse to throw away all DNA evidence found at a crime scene?
Answer:
orensically valuable DNA can be found on evidence that is decades old. However, several factors can affect the DNA left at a crime scene, including environmental factors (e.g., heat, sunlight, moisture, bacteria, and mold). Therefore, not all DNA evidence will result in a usable DNA profile.
Explanation:
A single base substitution mutation is likely to have a less deleterious effect when the base change exhibits which of the following results
A single base substitution mutation will be the least likely to cause a deleterious effect when the base change produces the same amino acid as the original.
What is a silent mutation?This scenario is what we call a silent mutation. What this means is that the mutation is almost undetectable due to its not affecting the protein that it will help to form.This is possible thanks to how the genetic code operates, different codons are able to code for the same amino acid.Therefore, there are mutations that do not affect the amino acid or the protein.Therefore, we can confirm that a mutation will have no negative effects if it is a silent mutation, meaning that the substitution of a base pair happens to code for the same amino acid as the original.
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After a lion has made a kill, birds will sometimes arrive to pick at the leftover carcass. Which are the predators: the birds, the lion, or both? Why?
Answer:
The lion is the predator because the lion killed . Hope that helps
1. Llena los espacios en blanco
a. ___________________________ se refiere al conjunto de reacciones metabólicas que tienes que ver con la degradación de moléculas complejas. Estas reacciones__________________________ energía por lo tanto se definen como____________________________
Answer:
tacos and burritos
Explanation:
tacos and burritos
What are the three layers that make up the body of a Cnidarian?
A. endoderm, mesoderm, ectoderm
B. endoderm, mesoglea, ectoderm
C. ectoderm, mesoderm, mesoglea
D. endoderm, mesoglea, epidermis
Answer:
endoderm, mesoglea, ectoderm
Explanation:
took the test