Answer:
Having HIV/AIDS weakens your body's immune system. It destroys the white blood cells that fight infection. This puts you at risk for opportunistic infections (OIs). OIs are serious infections that take advantage of your weak immune system.
Explanation:
A population of lab rats recently escaped into the sewer system of Washington, D.C. A brave researcher sampled this population and estimated the following phenotypic frequencies (which were caused by a single gene with two alleles: E and e).
61% normal eyes (EE)
26% cross-eyed (Ee)
13% blind (ee)
If this population were to reach a Hardy-Weinberg Equilibrium (HWE) in one generation, what would the phenotypic frequencies be in that new HWE generation? Let freq (e)=p and freq (e)=q. (Tip first calculate p and q from the observed, and provided, phenotypic frequencies)
freq EE =
freq Ee =
freq ee =
Answer:
freq EE = 0.55 freq Ee = 0.38 freq ee = 0.07Explanation:
Due to technical problems, you will find the complete explanation in the attached files.
* Explain about monohybrid and diyhybrib cross with the help of punnet square
2. Why do scientists often use thermoacidophile group of archaebacteria for research?
Archaebacteria have some unique characteristics.
Although members of kingdom Archaebacteria share many characteristics with members of kingdom Eubacteria, some of their characteristics are unique.
One such characteristic is the ability of archaea to live in extreme conditions.
What is Thermoacidophile archaebacteria?Thermoacidophile archaebacteria are a type of archaea that thrive in extremely hot and strong acidic (with low PH) environments. Thermoacidophile archaebacteria can be found in harsh environments such as in geothermal area, in the deep ocean vents and hot springs. Most of the
Thermoacidophile archaebacteria are chemotrophs (converts chemicals to food). They use sulfur as their energy source. They absorb the sulfur gas that is being released in their environment and reduce it to hydrogen sulphide, fixing it into an energy source.
Thus, this could be the answer.
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2.
How do scientists classify intrusive igneous features?
according to shape, texture, and their distance from the nearest volcanic field
according to shape, color, and their relationship to surrounding layers of rock
according to shape, size, and their relationship to surrounding layers of rock
Answer:
according to shape, size, and their relationship to surrounding layers of rock
Explanation:
Intrusive igneous features are those formations around the igneous rock that are developed over time when magma cools and forms a solid shape, and they may include stocks, sills, di.kes, etc.
Therefore, scientists classify intrusive igneous features according to shape, size, and their relationship to surrounding layers of rock.
If a cell membrane were completely permeable to all substances, could the cell continue to live? Explain your answer in depth.
How do bacteria develop resistance to drugs
Answer: Bacteria gain resistance to drugs because of mutations (permanent and random changes to their DNA) which means they have changed DNA coding, giving them the ability to resist the drug fighting them off. As a result, they survive and reproduce. Over time, more and more bacteria are generated as the DNA code for resistance is passed on over generations. This results in bacteria having the ability to resist drugs. This is particularly prevalent with antibiotics.
Bacteria develop drug resistance through genetic mutations, acquisition of resistance genes, production of inactivating enzymes, efflux pumps, and biofilm formation.
Bacteria can develop resistance to drugs through several mechanisms. One common way is through genetic mutations or acquisition of resistance genes. Mutations can occur in the bacterial DNA, leading to changes in the target site of the drug, rendering it ineffective. Resistance genes can be transferred between bacteria through horizontal gene transfer, allowing the recipient bacteria to acquire resistance traits.
Another mechanism is the production of enzymes that can inactivate the drug. Bacteria can produce enzymes, such as beta-lactamases, that break down antibiotics like penicillin, preventing them from functioning properly. Bacteria can develop efflux pumps that actively pump out drugs from their cells, reducing their concentration and effectiveness. This mechanism helps bacteria evade the lethal effects of antibiotics. Biofilm formation provides a protective environment for bacteria, making them less susceptible to drugs and immune system attacks.
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The correct question is:
How do bacteria develop resistance to drugs?
why do sun spots appear darker than their surroundings
Answer:
they are comer than their surroundings.
Sunspots are cooler because their magnetic fields inhibit the replenishing of heat from convective flows (due to the interaction between plasma and magnetic fields). This allows them to cool radiatively. The rest of the solar surface is constantly being replenished by convective cells that reheat it.
Answer:
because they are significantly cooler than the rest of the Sun's surface Despite their gloomy appearance, they are nonetheless extremely hot. A sunspot would shine brightly if it were alone in space.
OAmalOHopeO
yinto uxinzelelo lwengqondo?
Answer:
ni se la respuesta estoy respondiendo sólo para ganar puntos
Name one geographic region that has few or no fossil primates and explain why.
Answer:
Australia
Explanation:
Fossils are preserved remains (or mouldings) of ancient living things which are preserved in sedimentary rocks. Primate fossils are generally found along with other fossils, usually in ancient soils that contain information on the conditions under which they were formed. Primate fossils are generally found in tropical and subtropical regions (which represent the natural habitat in which these species live). Primates never lived in Australia, and therefore no fossil primates from this geographic area have been found.
The outbreak has rebounded in at least 30 US states in recent weeks, with the three most populous states -- California, Texas and Florida -- seeing a surge in new cases, with the highest daily number of new cases since the outbreak began.
Answer:
whats the question then?
Explanation:
Climate change as well as other human-driven environmental changes continue to cause loss of biodiversity in the
coming decades in addition to high rates of species extinctions. Biodiversity is a term that can be used to describe
biological diversity at a variety of different scales, but for now let's consider species diversity. Each rectangle represents a
plant community containing individuals of various species indicated by color and the total number of individuals
corresponds to the productivity of the ecosystem. Based on trends illustrated by the images, what conclusions apply?
Choose ALL that are appropriate.
-)))
A)
While species may fluctuate, biomass remains constant.
Scientific
Calc
B)
The green species increases in abundance during warm years,
C)
The productivity of the ecosystem decreases as the climate changes.
D)
Invasive species, represented by red, move in and displace native
species.
Highlight
Time
maining
3:17:40
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E)
Decrease in one species is compensated for by an increase in another
species.
24)
Answer:
e) decrease in one species is compensated for by an increase in another. is the answer.☺️What would be most likely to happen if some of the proteins Ik one of the photo systems were to change shape due to a drop in cell pH?
A. A decrease in the formation of NADPH
B. An increase in the formation of NADP+
C. A decrease in chlorophyll production
D. An increase in sugar production
Answer:
Option A
Explanation:
If some proteins in one of the photosystems undergo change in their shape due to a drop in pH of cell, they will not perform their activity. Due to this, there will be a decrease in the formation of NADPH ( that is less reduction of NADP due to blockage in the transport of electron).3. Define the following terms A) Transparent B) Translucent c) Opaque
Answer:
Transparent-->Allows all light to pass through.
Translucent-->Allows only some/partial light to pass through.
Opaque-->Allows no light to pass through.
Why is the frequency of natural disasters increasing?
1. There are less natural hazards occurring
2. Human population in areas prone to natural hazards has increased
3 . Deaths from natural disasters has decreased in developed countries and increased in developing countries.
Human population in areas prone to natural hazards has increased
a If a stationary body of water has a constant temperature from top to
bottom it is most likely a(n)
a. lake
b. pond
C.ocean
d. lagoon
Answer:
The correct answer is B. Pond.
Ponds are pretty small and shallow, so the heating from the air and sun gets distributed evenly across the water.
Let me know if this helps!
In the oceans on either side of the Isthmus of Panama are 30 species of snapping shrimp, 15 species on the Pacific side and 15 different species on the Atlantic side. Species live at different water depths. Morphological and genetic data show that Atlantic and Pacific species that live at similar depths are sister species. The sister species on each side of the isthmus cannot interbreed because the water in the canal is fresh water, not salt water, and provides a barrier to reproduction. A sea-level, salt-water canal between the two oceans has been proposed to make transport across the isthmus easier. Which of the following outcomes is the most likely result if such a canal were built?
A. greater percentage of difference in DNA sequences between sister species that inhabit deep water than between sister species that inhabt stalow water
B. greater percentage of difference in DNA sequences between sister species that inhabit shallow water than between sister species that inhabit deep water
C. similar percentages of difference in DNA sequences between all pairs of sister species
D. greater percentage of difference in DNA sequences between Atlantic species than between Pacific species
Answer:
The options of this question are wrong, you can find the correct options by navigating on the web. The options of this question are as follow:
1) The sister species will continue to diverge from each other.
2) None of the sister species will interbreed with each other.
3) The Atlantic and Pacific shrimp will continue to live in their respective oceans and not enter the new canal.
4) Shallow-water species from the two oceans that are sister species would be more likely to interbreed with each other than would be deep-water species.
Answer:
4) Shallow-water species from the two oceans that are sister species would be more likely to interbreed with each other than would be deep-water species
Explanation:
In evolutionary biology, sister species are defined as descendant species formed when one species splits during the course of evolution. Moreover, adaptation refers to the evolutionary process of adjustment of organisms to the environment, which is usually due to natural selection. During the course of evolution, organisms under different environments must change to adapt to their environments. In this case, it is expected that sister species that live in similar environmental conditions (i.e., shallow-water species) exhibit fewer phenotypic differences, being therefore more likely to interbreed with each other.
Which organelle is labeled A?
For each of the genotypes (AA,Aa or aa) below determine what the phenotype would be. Purple flowers are dominant to white flowers.
PP_____ Pp_____ pp_____
Answer:
PP and Pp are purple flowers. pp is white flowers.
Explanation:
Capital P is the dominant gene, while lowercase p is the recessive gene.
1.If you could only eat one meal for the rest of your life, what would it be?
2. How are you finding the topic DNA and cell division
In an experiment, a small dialysis bag is filled with a 20% salt solution. It is placed in a
beaker filled with a 40% salt solution. Assuming that water can pass through the
small pores of the dialysis bag, whereas the large salt molecules cannot, what will
happen to the size of the dialysis bag?
Answer:
The bag will get smaller
Explanation:
Osmosis can be defined as the process of diffusion or movement of water molecules across a semipermeable membrane from an area of higher concentration of water (i.e., lower concentration solution) to a lower concentration of water. For example, in cells, there are specialized pores called 'aquaporins' which are membrane proteins that form channels to transport water molecules by facilitated diffusion. In this case, the outside of the bag has a higher salt concentration than inside, thereby water molecules will move by facilitated diffusion through pores from inside to outside the bag.
Eutrophication occurs when excess nutrients are supplied to a region, leading to an algae bloom and ultimately ______
A. Coral bleaching
B. Ocean deoxygenation
C. Ocean acidification
D. Overfishing
Answer:
The correct answer is - B. Ocean deoxygenation.
Explanation:
Eutrophication is the process in which a water body gets excessively rich in nutrients that leads to the algal growth or plankton growth in this region and covers the complete surface or most of the water body.
Due to this algal and plankton growth, there is a significant decrease in the concentration of the dissolved oxygen in water bodies that result in the incapability of supporting the lives found in it. The primary and main reason for this deoxygenation is eutrophication. Ocean deoxygenation is the reduction of the oxygen concentration of the oceans.
Which is not a water quality monitoring parameter ?
1. Habitat
2. Turbidity
3.salinity
4. Ph level
Match the terms in column B to the descriptions in column A.
Column A:
1. Connects the larynx to the main bronchi
2. Includes terminal and respiratory as subtypes
3. Food passageway posterior to the trachea
4. Covers the glottis during swallowing of food
5. Contains the vocal cords
6. Indentation on the lung where the lung root structures enter and exit
7. Pleural layer lining the walls of the thorax
8. Site from which oxygen enters the pulmonary blood
9. Connects the middle ear to the nasopharynx
10. Pleural layer in contact with the surface of the lung
11. Increases air turbulence in the nasal cavity
12. Separates the oral cavity from the nasal cavity
Column B:
a. alveolus
b. bronchiole
c. conchae
d. epiglottis
e. esophagus
f. hilum
g. larynx
h. palate
i. pharyngotympanic tube
j. parietal pleura
k. trachea
l. visceral pleura
Answer:
1. Connects the larynx to the main bronchi k. trachea
2. Includes terminal and respiratory as subtypes b. bronchiole
3. Food passageway posterior to the trachea. e. esophagus
4. Covers the glottis during swallowing of food d. epiglottis
5. Contains the vocal cords g. larynx
6. Indentation on the lung where the lung root structures enter and exit f. hilum
7. Pleural layer lining the walls of the thorax j. parietal pleura
8. Site from which oxygen enters the pulmonary blood a. alveolus
9. Connects the middle ear to the nasopharynx. i. pharyngotympanic tube
10. Pleural layer in contact with the surface of the lung l. visceral pleura
11. Increases air turbulence in the nasal cavity c. conchae
12. Separates the oral cavity from the nasal cavity h. palate
Explanation:
1. The trachea is between the main bronchi and the larynx. It has semicircular rings of cartilage. The function of this organ is to conduct the air from the larynx to the primary/main bronchi.
2. After the primary (main), secondary, and tertiary bronchi, the terminal and the respiratory bronchioles come. They also conduct the air towards the alveoli so that the oxygen can enter the blood. The diameter of the bronchi terminal is smaller than the bronchi, and the diameter of the respiratory bronchi is smaller than the previous ones.
3 and 4. The esophagus is not part of the respiratory system. It is a tube that belongs to the digestive system since food has to pass through it to go to the stomach. The esophagus is posterior to the trachea, and the epiglottis closes the entrance to the larynx when we swallow to stop food from going to the lungs.
5. The vocal folds are in the larynx. This one is between the trachea and the pharynx. There are two types of vocal folds, the true and the false vocal folds. Both of them vibrate when air passes through them, allowing us to speak and make different tones.
6. The hilum is the lungs section where the bronchus, the pulmonary artery, and the pulmonary vein enter the lung. It is an indention that is in the middle part of the lungs.
7 and 10. The pleura has two sides, the parietal one and the visceral one. The first one is in contact with the lungs and the second one with the thorax's walls. Between them, there is a space called the pleural cavity. The cavity has fluid that allows the movement of the two pleurae. As a result, the lungs can move and fill with air.
8. After the respiratory bronchioles, we have the alveolar duct. The alveolar ducts lead to alveolar sacs. The alveolar sacs has the alveolus. They are thin walls that are in contact with capillaries. When the air is there, the oxygen passes through the thin walls. Then it goes through the capillaries' walls and into the blood.
9. The pharyngotympanic tube is also known as the Eustachian tube. It connects the middle ear to the nasopharynx. Its function is to regulate the pressure in the ear.
11. The conchae are in the nasal cavity. They are three projections in the nasal cavity, the inferior one, the middle one, and the superior. Their function is to increase the surface of the nasal cavity so that more air can enter with every inspiration. As they are projections, they modify the laminar airflow producing a turbulent flow.
12. The palate is between the nasal cavity and the oral cavity. It has two parts, the soft palate, and the hard palate. The palate helps in the production of certain sounds and divides the nasal cavity from the mouth.
DNA is referred to as a______, meaning that it has
strands that are______together.
Answer:
molecule
wound
Explanation:
DNA is the chemical name for molecule. The strands wind together and form a double helix.
example of natural system of classifying organisms
Answer:
In natural system of classification of Organisms, homology is brought out through the study of internal and external characters. Homology is the relationship of comparable structures having been derived from a common form.
For example, the fore arm of different land vertebrates has the same pentadactyl constitution.
Explanation:
pls mark brainliest
explain how the various specialiesed cells are modified to Cary out to their function 20mark
Explain about Photosynthesis . ?
Answer:
Plants and other creatures utilize photosynthesis to convert light energy into chemical energy, which is then released to power the organism's metabolic processes through cellular respiration.
OAmalOHopeO
Answer:
its basically a process thats plants use and many other organisms to convert light energy into chemical energy that helps them grow and without it, plants would go bye bye . :)
Explanation:
Learned it in science class lol.
Read the information below then answer the questions which follow:
To grow, plants require water. They cannot get this water unless it is available in the soil. Plants
obtain water from the soil through their roots. It then passes up the stem and to the leaves and
flowers. The plant does not take all the water available in the soil. Much of the remaining water
evaporates into the surrounding air.
In an experiment, a stem which contained several flowers were placed in a beaker of water
containing red ink.
QUESTION 1
(1 mark)
What is the purpose of the experiment?
Answer:
I believe the experiment was too see if the flowers that would grow from the stem would turn out to be red in color. (Which is the reason they put red ink.)
(hope this helped :P)
What is the process of
evaporation?
A. The process in which plants release vapor into
the atmosphere
B. Any process that returns water from the
atmosphere to the earth
C. The process in which liquid water turns to
water vapor
19. What percent of forest is found in Nepal at present? 1. 50% 2. 28% 3. 29% 4. 39%
Answer:
1. 50%
hola hai
have a great dayy
