The 1918 influenza epidemic killed between 50 million and 100 million people worldwide. This epidemic happened near the end of World War I. More people died from the influenza epidemic than were killed in the war. Which of the following explains why this virus was so deadly worldwide?
A. Infected soldiers returning from the war spread the virus when they coughed
B. Medical personnel often became ill as a result of exposure to airborne virus particles.
C. Food was scarce because of the war, so people were undernourished, and their immune systems were weakened.
D. All of the above.
Answer:
D
Explanation:
In order for water to collect in earths atmosphere and form clouds it must first undergo what process?
A) condensation
B) convection
C) evaporation
D precipitation
Answer:
The answer is D: Precipitation
In addition to stealing energy
from the host, how can parasites
cause problems for their hosts?
Answer:
They can cause the deprivation of nutrients, fluids, and metabolites. this may also cause pathological effects in their hosts such as pathogenic effects.
the parts of DNA that provide the code for the protein are the
Answer:
the bases / base sequence!
Explanation:
Hope that helps!
How are gametes produced?
Gametes are haploid cells, and each cell carries only one copy of each chromosome. These reproductive cells are produced through a type of cell division called meiosis. ... These cells develop into sperm or ova. The ova mature in the ovaries of females, and the sperm develop in the testes of males.
Answer:
Gametes are produced by Mitosis (not meiosis) and after fertilization a diploid zygote is created. The single zygote cell never grows or divides my mitosis. It can only divide by meiosis to produce haploid cells once more, which then produce the main adult body.
[tex] \colorbox{pink}{ \sf{carryonlearning}}[/tex]
7. Mutations in DNA occur when there is a change in the base-pair sequence of a gene. Which of these is
not an accurate statement about mutations?
A. Most mutations occur when a cell copies its DNA for cell division.
B. Mutations can involve adding, removing, or substituting genes.
C. Mutations always cause a change in the phenotype of the organism.
D. Mutations can be beneficial.
Answer: C
Explanation: None
Which animal is a tertiary consumer in this food chain?
Answer: EL ANIMAL QUE ES CONSUMIDOR TERCERIANO ES LA SERPIENTE
xplanation:PORQUE ES CARNIVORO
Ecologists have found that dense populations of organisms have lower birth rates, higher death rates, and slower growth rates than less dense populations. Which best explains these findings?
A
interactions between predator and prey
B
natural environmental disturbances
C
unusual weather changes
D
stressors from competition for resources
O LEVEL 1
04
What effect does biodiversity have on a
community?
A. It enables species to survive in a desert
B. It enables the community to withstand
changes
C. It makes destruction by insects impossible
D. It makes primary succession more likely
Answer:
d
Explanation:
Biodiversity is what the trees and the animals live on so they need it to survive.
1. Which of the following best explains how
behaviors, such as swarming and flocking, help
protect organisms?
a. Individuals in swarms or flocks act as decoys
to distract predators.
b. The movement and size of the swarm
or flock confuses predators.
c. Working together in swarms or flocks
requires less energy
d.The size of most swarms and flocks
can overtake larger predators.
An increase in stimuli to the brain results in an increase in the responses of an organism. TRUE OR FALSE?
Answer:
True
Explanation:
As the intensity of stimulus increases abruptly then response increase in continuous as different absolute intensities. In fact the brain is able to respond to the differential change in magnitude of stimuli and not the absolute change in magnitude.
Hence, the given statement is true
_______________________ is an animal's ability to blend into its surroundings.
a
artificial selection
b
evolution
c
natural selection
d
camouflage
[tex] \huge \color{magenta}{ \boxed{ \large \sf \color{blue}{d. \: Camouflage}}}[/tex]
Camouflage is the use of any combination of materials, coloration, or illumination for concealment, either by making animals or objects hard to see, or by disguising them as something else. Examples include the leopard's spotted coat, the battledress of a modern soldier, and the leaf-mimic katydid's wings.Home land of Shorea robusta is
a) alpine zone
b) temperate zone
c) tropical zone d) sub alpine zone
Answer:
c) tropical zone
Explanation:
Absorbe nutrientes por medio de micro vellosidades que recubren y aumentan la superficie de absorción
Sobre la pregunta:
Cucigrama. Pregunta 1 vertical. Absorbe nutrientes por medio de micro vellosidades que recubren y aumentan la superficie de absorción
Answer:
Intestino delgado
Explanation:
El intestino delgado es el organi mas largo del tubo digestivo, pudiendo medir 7 metros de longitud y 3 cm de diametro. Se caracteriza por estar sumamente plegado sobre si mismo. La primera porcion, llamada duodeno, recibe secresiones de glándulas biliar y pancreática, y las mezcla con enzimas digestivas. Esta mezcla se encarga de degradar la comida y transformarla en sustancias solubles, como amino ácidos.
Es en el intestino delgado donde ocurre la absorción de nutrientes. Las paredes intestinales estas cubiertas por microvellosidades que aumentan la superficie de absorción.
Las microvellosidades son células que componene el epitelio columnar, y que extienden proyecciones hacia el lumen del organo.
A scientist is examining cells under a microscope. Which would best help the scientist identify the tissue as plant or animal?
A. The presence or absence of a cell wall
B. the presence or absence of DNA
C. Plant cells would be green
D. Animal cells would contain a nucleus
SORRY FOR THE LITTLE POINT PLEASE ANSWER ITS DUE IN 2 MINUTES
Answer:
I think the answer is A
Explanation:
The presence or absence of a cell wall is examining cells under a microscope.
What is Cell wall?Cell walls are a specific type of extracellular matrix that cover every plant cell. Many of the traits that set plant cells apart from animal cells are caused by the cell wall.
The cell wall serves a variety of activities that are essential to plant life, despite being frequently thought of as an inert product used only for mechanical and structural purposes.
These include: giving the living cell mechanical defense and a chemically insulated environment; offering a porous medium for the circulation and distribution of water, minerals, and other small nutrient molecules.
Therefore, The presence or absence of a cell wall is examining cells under a microscope.
To learn more about Cell wall, refer to the link:
https://brainly.com/question/965751
#SPJ2
Florida orange growers often have hundreds of trees in their orchard, similar to those shown here. Florida temperatures can be
mostly tropical or temperate. However, even areas of southern Florida can be exposed to freezing temperatures in the winter.
Suppose that an extreme frost affected an area where the orange orchard is growing. Predict the impacts of this event on the
orange trees. Select ALL that apply.
A)
The trees will undergo mutations that enable them to survive harsher and
colder winters in the future.
B)
This could result in a population bottleneck, where few trees survive,
resulting in lowered genetic diversity
C)
The trees will undergo artificial selection which results in only trees that
are better adapted to freezing temperatures
D)
Trees with the ability to survive the freezing temperatures will reproduce
and create offspring with similar genetic makeup.
E)
The trees in the orchard may all be of similar genetic origin, resulting in a
common tolerance or susceptibility to the freezing weather.
Answer:B,D,E
Explanation: ur welcome
follow me on ig amandaagneww
The possible impacts include common tolerance or susceptibility, population bottleneck and similar genetic makeup (Options B, D and E).
Common tolerance is due to the selection of trees that are tolerant to these environmental conditions.Population bottleneck is a consequence of the decrease in genetic variability as a consequence of selection.Similar genetic makeup is due to the reduction in genetic variation of the original population.In conclusion, the possible impacts include common tolerance or susceptibility, population bottleneck and similar genetic makeup (Options B, D and E).
Learn more in:
https://brainly.com/question/8898854
Which of the following is NOT a type of wetland?
a: marsh
b: bog
c: swamp
d: pelagic
Explanation:
i have no clue, but good luck, hopefully you pass the test
In co-dominance, two dominant alleles are expressed at the same time.
true or false?
false
because in co dominance two dominant alleles are completely expressed.
A morning glory has a {BLANK}
form of corona.
Answer:
I think the answer is
A morning glory has a risen form of corona
_____________________________ is famous for his work on natural selection.
a
Charles Darwin
b
Henry Cavendish
c
Babe Ruth
d
Isaac Newton
Answer:
a
Charles Darwin
Explanation:
What kind of virus caused the 1918 pandemic?
Answer:
The answer is Spanish flu
Answer:
H1N1 virus with genes of avian origin
Explanation:
The outbreak was caused by an influenza type, where the subtype of it is know as H1N1 virus.(. Characterization of five of the eight RNA segments of the 1918 influenza virus indicates that it was the common ancestor of both subsequent human and swine H1N1 lineages, and experiments testing models of virulence using reverse genetics approaches with 1918 influenza genes have begun in hopes of identifying genetic features that confer virulence in humans..... EXTRACTED FROM A TEXT FOR MORE INFO)
A student is given a list of traits and is asked to organize them in a Venn diagram as shown below.
Which traits should the student put in section II (Both)?
1 a scar and blood type
2 tiger's stripes and wolf's social status
3 musical talent and wolf's social status
4 musical talent and skin color
Answer: The correct answer is option B) a scar and wolf's social status.
The acquired traits can be defined as the traits, which are only influenced by the environment of the organism. The acquired trait cannot be passed down to the offspring, as they are not genetically determined. A scar and the social status of any organism is dependent on the behavior of the organism to the environment, no genes code for both of these characters. So, scars and Wolf's social status is an acquired trait.
Explanation:
What is the chemical equation for photosynthesis
Answer:
6CO2 + 6H2O --> C6H12O6 + 6O2
Explanation:
Have a good day :)
Answer:
6CO2 + 6H2O → C6H12O6 + 6O2
Explanation:
hope that helps girly good luck!
What are the advantages of using pea plants to study heredity *
O only reproduce asexually
O easily observable traits
only reproduce by self-fertilization
O provide food
[tex]\huge{ \mathbf{ \underline{ Answer} \: \: ✓ }}[/tex]
There's many advantages of using pea plants as their traits are easily observable and have short life cycle.
Therefore the correct option is :
O easily observable traits
_________________________
[tex]\mathrm{ \#TeeNForeveR}[/tex]
The cell cycle is the life of the cell from the time it is first formed from a dividing parent cell until its own division into two cells
Explanation:
cell cycle is made up of three main parts: interphase, mitosis, and cytokinesis. Most biologists agree that interphase makes up the period of time that a cell would be preparing for cell division. Cells spend the majority of their lives in this stage. During interphase a cell is going to be growing, replicating its genetic material and essentials to carry out cell division, and proofreading the genetic material to ensure replication has occurred correctly. This doesn’t sound like much, but it’s actually the longest part of the cell cycle. Once this is complete, the cell will then go through cell division and, theoretically, split into two new cells (cytokinesis).
How cytokinesis works will depend upon the type of cell that is dividing. Here is an image that summarizes the differences in cytokinesis in plant cells and animal cells, which is the classic example used in many introductory biology courses:
Which of the following creates an
allluvial fan
A The buildupci sediment at the mouth of a
3. The seriment deposits by the side of flooding
C. The sticons that leave deepvalleys and
D. There is by ters,
Which of the following is NOT part of the first line in immune defense? *
Mucus
Sweat
Tears
Antibodies
Skin
Answer:
Antibodies
Explanation:
Skin, tears, sweat and mucus, are all first line of defense.
The part that is not the first line of immune defense is antibodies. The correct option is d.
What are antibodies?
The immune system is a bodily system that consists of white blood cells and antibodies that aid in the fight against any external invaders or infections that enter the body.
They are the body's defense mechanism. Antibodies recognize the pathogen and assist your body in combating it. These antibodies are produced by your body's immunological system. Everyone possesses a variety of antibodies. Each of them detects intruders, such as viruses and bacteria, that might cause illness.
An antibody is a protein that the body's immune system produces when it recognizes dangerous chemicals known as antigens. Microorganisms (bacteria, fungi, parasites, and viruses) and chemicals are examples of antigens.
Therefore, the correct option is d, Antibodies.
To learn more about antibodies, refer to the link:
https://brainly.com/question/29704391
#SPJ2
experiment yeast fermentation ，what is the purpose of boiling the glucose solution earlier？
Answer:
The correct answer is - to sterilize it and remove any oxygen.
Explanation:
Boil the glucose solution to sterilize it and remove any oxygen, leaving behind the glucose needed for anaerobic respiration. High temperature kills all the microbes and sterilizes the solution.
Boiling the glucose solution earlier also helps in removing the oxygen from the solution for preparing the anaerobic respiration in the experiment desired. Sterilization of the solution also helps it in avoiding any microbes to present in the solution and affect the experiment.
Look at picture
People may remove fallen trees from Forrest's to reduce the fire risk removing the trees is now thought to have an impact on the health of the forest. Which impact would removing fallen trees from forests most likely have on forest health?
Answer:
C
Explanation:
Without decaying wood , the nutrient cycle is unbalanced
Decreased soil fertility by preventing nutrient recycling. Therefore, option (C) is correct.
What is nutrient recycling?Nutrient recycling is the process by which essential nutrients, such as carbon, nitrogen, phosphorus, and sulfur, are continuously cycled through the biotic and abiotic components of an ecosystem. This cycle involves the movement of nutrients from the non-living (abiotic) to the living (biotic) components of an ecosystem and back to the non-living components.
The process of nutrient recycling involves the decomposition of dead organic matter by microorganisms and the subsequent release of nutrients into the soil, water, and air. These nutrients are then taken up by plants and other organisms, which are eventually consumed by other organisms in the food chain. When these organisms die or produce waste, the nutrients are again released into the environment to be used again.
Nutrient recycling is crucial for the maintenance of healthy ecosystems and the sustainability of life on Earth.
Learn more about nutrient recycling, here:
https://brainly.com/question/1410462
#SPJ2
What is the advantage and disadvantage of drug abuse