What affect does the Sahel's climate and physical characteristics have on population distribution?
Answer:
The Sahel has been labeled as one of those regions with the danger of overpopulation. It has been described with adjectives such as semi-arid, hot, dry, windy or sunny.
Sources have it that the G5 Sahel countries which include Mali, Niger, Burkina Faso, Mauritania, Chad will increase from about 84 million inhabitants in 2019 to 197 million in 2050. This projection includes people under 15 years of age which comprise about 50% of the entire population.
The climate itself doesn't seem to deter population growth. What seems to be occurring is sedentarization. This is due to rapid desertification and drought which have persisted for some time.
Explanation:
Sedentarization refers to the choice of a group of people who usually are very nomadic or migratory to settle permanently in a place.
This is usually due to a more favorable weather and topography which supports agriculture.
Cheers!
Examine the cell diagrams shown. Which of the following choices identifies the eukaryotic cell for the correct reason?
Select one:
a. Because it contains organelles
b. Because it is a single cell
c. Because it contains genetic material
d. Because it is much smaller
Answer:
Option a
Explanation:
A eukaroytic cell contains more organelles than prokaryotic cells, and it is much bigger and complex.
hope this helps and is right :)
The choice that identifies the eukaryotic cell for the correct reason would the presence of organelles. The correct option would, therefore, be A.
Eukaryotic cells differ from prokaryotic cells such that:
Eukaryotic cells have nucleus, prokaryotic cells do not. The genetic materials of prokaryotic cells lies freely within the cytoplasm.Eukaryotic cells have membrane-bound organelles while prokaryotic cells do not. In size, eukaryotic cells (10 - 100 microns) is much bigger than prokaryotic cells (0.1 - 5 microns).In the images, the organelles of the eukaryotic cells can be seen while the smaller size of the prokaryotic cell can also be observed.
More on the differences between eukaryotic and prokaryotic cells can be seen here: https://brainly.com/question/20434284
Ladybird is a type of bird.
True
False
Answer: it’s false
Explanation: ladybird is a beetle
Answer:
true answer because lady bird has light bone and flight feadures
An individual has the genotype Aa Bb CC Dd ee FF. How many different types of gametes could it produce in terms of unique allelic combinations of these genes?
Answer:
64
Explanation:
The individual in this question with genotype: Aa Bb CC Dd ee FF has six (6) different traits encoded by six (6) genes. The diploid number of the organism in this question is 12, however, the number of possible allelic combinations in each gamete can be calculated by using 2^n where n = haploid number of chromosome or number of allele that can be in one gamete.
Using this simple formula, 6 possible alleles can be in the gamete of this organism with the above genotype, hence, the individual can produce 2^6 = 64 different types of gametes in terms of unique allelic combinations of these 6 genes.
what is Physiological hylogical or attitudinal barriers to communication?
Answer:
Physiological barriers to communication are related with the limitations of the human body and the human mind (memory, attention, and perception). Physiological barriers may result from individuals' personal discomfort, caused by ill-health, poor eye sight, or hearing difficulties.
Explanation:
12 Which direction does blood flow in arteries?
Answer:
Like all fluids, blood flows from a high pressure area to a region with lower pressure.
Good luck!
Answer:
The arteries carry blood out of the heart and the veins carry it in. The flow of blood through the vessels and chambers of the heart is controlled by valves.
What is the structure inside of the nucleus called and the name of the phase of the
picture below?
a. chromatid and interphase
b. chromosome and prophase
C. chromatin and interphase
d. centromere and mitosis
you haven't added a picture
Explanation:
But if you can describe the picture I can answer it
The nucleus is the major and the central organ of the cell. The structure inside of the nucleus is chromatin and the phase is interphase.
What is chromatin and interphase?Chromatin is a complex structure present only in the eukaryotic cells that are composed of protein and DNA. It is required for the packaging of the long DNA threads into a compact and dense form.
Chromatin makes up the chromosome and is the packaging element of the genetic material. The basic and smallest unit of the chromatin is the nucleosome.
Interphase is one of the cell cycle periods that contain the non-dividing phase. The G1, S and the G2 phase of the cell cycle are part of the interphases.
In this phase, the cell undergoes the process of replication or duplication and cell growth. Not the actual division of the cell occurs instead it prepares the cell for the division.
Therefore, option c. interphase and chromatin are the phases and the structures present inside the nucleus.
Learn more about interphase and chromatin here:
https://brainly.com/question/8353026
which product is made from a renewable resource?
A. a penny made with copper?
B. computer chips made from silicon?
C. a pie made with blueberries?
D. earrings made from silver?
Answer:
C. A pie made with blueberries
Explanation:
Blueberries can be grown naturally, so they are a renewable resource.
Blueberries are renewable resources. Hence, option C is correct.
What are renewable resources?Renewable resources are those natural resources that continue to exist even after their consumption. They are also known as flow resources.
Renewable resources include plants, biomass, ocean currents, energy, wind, solar energy, tides, waves, etc. All these things will continue to exist even after their consumption. They can be used repeatedly and do not run out.
Advantages of renewable resources:
They are cheap.They are easily available.They are eco-friendly.They are clean and efficient.Copper, silicon, and silvers are minerals and non-renewable resources, and blueberries are plant products and hence, they are renewable resources. Therefore, option C is correct.
Learn more about renewable resources, here:
https://brainly.com/question/19604560
#SPJ2
Types of histokinate
Answer:
moving tissue type,moving fluid type,processing of tissue
Need help fast pls will give brainliest
Answer: increase,high,producers...
Explanation:
This is the result of or response to changing the manipulated variable.
Answer:
Responding or dependent variable
Explanation:
The very rare Bombay blood phenotype in humans results in blood type O because of the lack of both the A and B antigens in individuals who are of hh genotype. This genotype results in blood type O regardless of the genotype at the unlinked I locus. If two parents are both of I A I B Hh genotype, what is the probability that their child will have type blood B
Answer:
The probability that the child will have type blood B equals 3/16.
Explanation:
Available data:
Individuals with the rare Bombay blood phenotype lack both the A and B antigens in individuals and/or are of hh genotype.Cross between two parents that are both of I A I B Hh genotypeCross: IAIB Hh x IAIB Hh
Gametes) IAH, IAh, IBH, IBh
IAH, IAh, IBH, IBh
Punnett square) IAH IAh IBH IBh
IAH IAIAHH IAIAHh IAIBHH IAIBHh
IAh IAIAHh IAIAhh IAIBHh IAIBhh
IBH IAIBHH IAIBHh IBIBHH IBIBHh
IBh IAIBHh IAIBhh IBIBHh IBIBhh
F1) Genotype
1/16 IAIA HH 2/16 IAIAHh 1/16 IAIAhh 2/16 IAIBHH 4/16 IAIBHh 2/16 IAIBhh 1/16 IBIBHH 2/16 IBIBHh 1/16 IBIBhhPhenotype
3/16 Blood type A 6/16 Blood type AB 3/16 Blood type B 3/16 Blood type 0How and why does a DNA molecule replicate itself?
Answer:
DNA makes a copy of itself during cell division. The separation of the two single strands of DNA creates a 'Y' shape called a replication 'fork'. The two separated strands act as templates for making the new strands of DNA.
Explanation:
This list of terms BEST describes ?
A) hypothesis
B) law
C) Theory
D) variable
Answer:
the answer is
Explanation:
hypothesis
write a letter to the government explaining the dangers posed by global warming/climate change
Answer:
Global climate change has already had observable effects on the environment. Glaciers have shrunk, ice on rivers and lakes is breaking up earlier, plant and animal ranges have shifted and trees are flowering sooner. Effects that scientists had predicted in the past would result from global climate change are now occurring: loss of sea ice, accelerated sea level rise and longer, more intense heat waves. Scientists have high confidence that global temperatures will continue to rise for decades to come, largely due to greenhouse gases produced by human activities. The Intergovernmental Panel on Climate Change (IPCC), which includes more than 1,300 scientists from the United States and other countries, forecasts a temperature rise of 2.5 to 10 degrees Fahrenheit over the next century.
Explanation:
does this work :)
Methods used to study mineral elements present in plants
Answer:
The quantitative concentration of mineral elements present in horticultural crops can be determined by atomic absorption spectrometry (AAS), inductively coupled plasma atomic emission spectrometry (ICP-AES), inductively coupled plasma mass spectrometry (ICP-MS), flame atomic absorption spectrometry (FAAS)
Which of the following is an unintended consequence of cutting down trees?
A. Cleared land can be used for agriculture.
B. Depleting wooded areas means fewer habitats for forest
organisms.
C. People burn wood for fuel.
O. D. People use wood to build houses
Answer:
B. Depleting wooded areas means fewer habitats for forest organisms
Which of the following statements regarding power is false: a. It is often referred to as speed-strength. b. It is desirable in sporting events such as the high jump. c. It determines the speed of movement execution. d. It requires a high rate of muscular contraction. e. None of the above.
Answer:
e. None of the above.
Explanation:
Power is simply defined as the rate of doing work can be regarded as the rate at which a mechanical energy is put into action or performed through an engine, animals.
Power is required in cases such as;
✓It is often referred to as speed-strength
✓ It is desirable in sporting events such as the high jump
✓It determines the speed of movement execution.
✓ It requires a high rate of muscular contraction.
FACERII (Why the bulb of a dynamo glow brightly when
speed of bicycle is increased and become dim when the
speed is decreased? Give reasons.)
Am
ma
Answer:
As the bicycle moves, the wheel turns a magnet inside a coil. This induces enough electricity to run the bicycle's lights. The faster the bicycle moves, the greater the induced voltage - and the brighter the lights.
Explanation:
hope you understand :)
An object of mass 300 kg is observed to accelerate at the rate of 4 m/s².CALCULATE the
force required to produce this acceleration
Answer:
1200N
Explanation:
since f=ma
we keep all the values and we get it 1200 N
What is 3 examples of species population
Explanation:
it's can be any animal or plant
Essay.5 points
Explain the importance of microscope n field of medicine.
Answer:
Doctors use microscopes to spot abnormal cells and to identify the different types of cells. This helps in identifying and treating diseases such as sickle cell caused by abnormal cells that have a sickle like shape.
using what have you learnt about the effect of concentration gradient and surface area to volume ratio, explain the adaptations of a leaf for photosynthesis
Answer:
thanks
Explanation:
Leaves are adapted for photosynthesis and gaseous exchange.
They are adapted for photosynthesis by having a large surface area, and contain openings, called stomata to allow carbon dioxide into the leaf and oxygen out. Although these design features are good for photosynthesis, they can result in the leaf losing a lot of water. The cells inside the leaf have water on their surface. Some of this water evaporates, and the water vapour can then escape from inside the leaf.
When water evaporates from the leaves, resulting in more water being drawn up from the roots, it is called transpiration.
To reduce water loss the leaf is coated in a waxy cuticle to stop the water vapour escaping through the epidermis. Leaves usually have fewer stomata on their top surface to reduce this water loss.
Leaves enable photosynthesis to occur. Photosynthesis is the process by which leaves absorb light and carbon dioxide to produce glucose (food) for plants to grow. Leaves are adapted to perform their function, eg they have a large surface area to absorb sunlight.
Plants have two different types of 'transport' tissue, xylem and phloem. These specialised tissues move substances in and around the plant.
Which blood type can give to all the other blood types?
Answer:
Type O
Explanation:
Type O can donate red blood cells to anybody. It's the universal donor. Group AB can donate to other AB's but can receive from all others.
which of the following is NOT true of eukaryotic cells
A. Eukaryotic cells have a nucleus to hold, protect, and organize the genetic material.
B. Eukaryotic cells can be unicellular or multicellular.
C. Eukaryotic cells are considered very primitive and basic.
D. Eukaryotic cells can reproduce asexually
Answer:
c
Explanation:
puesto que las células eucariotas son la evolución celular de las células procariotas y ahí se muestra como que no es cierto , por otro lado nos dice también que estas células no tienen complejidad y ese es otro dato erróneo, ya que ellas están compuestas por gran cantidad de orgánulos que realizan diferente funciones
Which statement best describes the similarities between insects and animals? (2 points)
a
Insects and animals are all born in a live birth from the mother.
b
The infants of all insects and animals look similar to their parents.
c
The life cycles of insects and animals all start from a fertilized egg.
d
Insects and animals develop an exoskeleton as they grow, which protects them.
Question 18 (2 points)
(08.03 MC)
During their life cycle, a bee goes through complete metamorphosis while a grasshopper goes through incomplete metamorphosis. What is the main difference between the life cycles of a bee and a grasshopper? (2 points)
a
The grasshopper forms a cocoon, while the bee forms a chrysalis.
b
A grasshopper starts its life as a fertilized egg, while the bee doesn't.
c
A bee goes through three stages, while a grasshopper goes through four stages.
d
A bee goes through a pupa stage, while the grasshopper goes through a nymph stage.
Question 19 (2 points)
(08.03 MC)
Samantha recorded observations on the similarities between the life cycle of an eagle and the life cycle of a moth that undergoes complete metamorphosis. Which observation is Samantha wrong about? (2 points)
A moth and an eagle both start their life cycle as a fertilized egg.
A moth and an eagle both hatch from an egg outside of their mother.
A moth and an eagle both undergo complete metamorphosis with significant change during development.
a
I
b
I and II
c
II and III
d
III
Question 20 (2 points)
(08.03 HC)
A new insect is discovered, and you want to know whether the insect goes through complete or incomplete metamorphosis. The insect lays eggs, and the eggs develop into an insect that has colorful wings and long thin legs. What observations would you use to prove that the insect goes through complete metamorphosis? (2 points)
a
Observe at what stage the bugs are able to reproduce. If they reproduce quickly, they go through incomplete metamorphosis.
b
Observe how long it takes the insect to develop. The insect that goes through incomplete metamorphosis will develop quicker.
c
Observe how the insect changes as it develops. If the insect develops a cocoon, it is likely going through complete metamorphosis.
d
Observe what the insect eats over time. If it eats other bugs, it likely goes through complete metamorphosis please answer all I give brainlest
Answer:
1. c . The life cycles of insects and animals all start from a fertilized egg.
2. d . A bee goes through a pupa stage, while the grasshopper goes through a nymph stage.
3. b . I and II
Explanation:
The egg fertilization is very important for the emergence of almost all organisms. If the egg is fertilized then it will change into an organism otherwise no organism is produced from that unfertilized egg. The bees has four distinct life stages i.e. the egg, larva, pupa and adult whereas grasshopper has three stages i.e. egg, nymph, and adult. A moth and an eagle both start their life cycle as a fertilized egg and moth and an eagle both hatch from an egg which is laid by the mother outside of their body..
Answer:
It is 1 and 2 ethier one of those hope you get it right! (:
How a forest ecosystem would change if no sunlight were available to it
Explanation:
If there is no sunlight the plants will die. Then because of dead plants the herbivores will die and so on. the food chain will be very disrupted.
Term
1.
2.
3.
countrationer
5.
6.
7.
8.
9.
10.
11.
12.
Definition
high to low movement of molecules; uses transport protein; no energy required
a solution that has the same concentration of solute as the cells it surrounds
water-loving
a difference in the concentration of molecules from one location to another
structure that identifies the cell
having less solute molecules than the cytoplasm of a cell
allows certain molecules to pass through; keeps some molecules out
the amount of molecules in a specified area
use of vesicles to move large molecules out of the cell
the substance that is dissolved in a solution
movement of molecules from a low to high concentration; uses transport protein;
requires energy
movement of water from an area of high concentration to an area of low
concentration through a cell membrane; no energy required
mixture created when one substance is dissolved in another
movement of molecules from an area of high concentration to an area of low
concentration; no energy required
use of vesicles to move large molecules into the cell
a solution that has a higher concentration of solute molecules than the cytoplasm
of the cell it surrounds; will cause cells to shrink
phospholipid and protein covering of every cell that controls what goes into and
out of each cell
the liquid that dissolves the solute in a solution
water-fearing
a solution that has a lower concentration of solute molecules than the cytoplasm
of the cell it surrounds; will cause cells to swell and burst
a structure that helps to move molecules across the cell membrane
current model that describes membrane structure in which a phospholipid sea is
embedded with a wide variety (mosaic) of protein molecules
13
14.
A diffusion
15.
16.
17
18.
19.
20.
21.
22.
Answer:
structure that identifies the cell / recognizes stuff around the cell. hypotonic. having less solute molecules than cytoplasm of a cell / having a lower ... movement of molecules from low to high; uses transport protein; requires energy ... movement of molecules from high concentration to low concentration; no energy required.
Explanation:
why are new pennies made with less copper than old pennies
Answer:
because it is cheaper to afford
Explanation:
According to cell theory, all new
cells...
A. must share DNA with existing cells.
B. must eat.
C. come from other cells.
Answer:
C. come from other cells.
Explanation: