Answer:
Open-pit mines are utilized when stores of industrially helpful metal or shakes are found close to the surface. ... Interestingly, minerals that have been discovered underground however are hard to recover because hard rock can be arrived at utilizing a type of underground mining.
Explanation:
gib brain
In the Diffusion Through a Membrane lab, the model cell membranes
allowed certain substances to pass through based on which characteristic
of the diffusing substance?
O (1) size
O (2) shape
O (3) color
O (4) temperature
Answer:
4
Explanation:
Higher temperatures increase the energy and therefore the movement of the molecules, increasing the rate of diffusion. Lower temperatures decrease the energy of the molecules, thus decreasing the rate of diffusion
Which of the following is *true* of the placenta? Question 18 options: 1) It fully develops six months after birth. 2) It forms during the seventh month of prenatal development. 3) It is the fluid-filled sac that houses the developing embryo and fetus. 4) It allows the exchange of nutrients between the embryo and the mother, while at the same time filtering out harmful material.
Answer:
4) It allows the exchange of nutrients between the embryo and the mother, while at the same time filtering out harmful material.
Explanation:
The placenta is an organ present in all mammals. She is confirmed between the 6th and 8th week of pregnancy and has as main function the exchange of substances between the mother and the fetus. Among these substances are nutrients, gases and even secretions. The placenta also has the function of fighting infections and promoting immunity to the fetus, in addition, it can act as the lung, the intestine and the liver, while the fetus does not develop its organs.
why the solute can't move from higher concentration to lower concentration?
Answer:
yes, so when the concentration of a solute is high, the concentration of water is lowered since there is more solute per water, less water per solute. Thus, when water moves from low concentrations of solute to high concentrations of solute, it moves from high concentrations of water to low concentrations of water.
Explanation:
(06.04 LC)
Fertilization usually occurs in the (3 points)
A. End of the Fallopian tubes B. Vagina
C. Ovaries
D. Uterus
Answer:
A
Explanation:
1. Which of the following most accurately complete the statement below -
An increase in biodiversity result in
A. More competition for abiotic factors
B. Less competition for biotic factors
C. An increase in the sustainability of an ecosystem
D. A decrease in the sustainability of an ecosystem
Answer:
The correct answer is - C. An increase in the sustainability of an ecosystem.
Explanation:
Biodiversity is the variety of different biological species and populations on the earth or in an ecosystem. Biodiversity helps in maintaining health by providing food and other resources. Higher biodiversity healthier the earth.
Sustainability is the ability to maintain the ecological process and its structure and function in case of external stress for a longer time. The more sustainability of an ecosystem the healthier the ecosystem. The biodiversity of an ecosystem provides sustainability to the ecosystem. An increase in biodiversity will lead to a more sustainable ecosystem.
Minerals in sediment may seep into the ______________ and replace the body’s material with minerals that harden over time.
Answer:
erm
Explanation:
digestive system.
no idea
which statement describes the iterative step in the engineering design process
1. engineers should properly communicate their results
2. engineers run through the steps of the process multiple times
3. engineers always take cost of the design into consideration
4. engineers work as a team on most steps
Answer:
engineers alwaystake cost of design into consideration
8. How did the Grants test their hypothesis that differences in birds' songs can keep finches
from breeding with members of other species?
a. They watched which birds were mating with each other and listened for the songs the
birds were singing.
b. They recorded birds singing on the island of Daphne Major for an entire breeding
season to see which type of song was used more often by each species.
c. They played the songs of medium ground finches and cactus finches through a
loudspeaker at different times, when individuals from both species were present, to see which
species responded to each song,
d. They played the song of the medium ground finch to medium ground finch males
through a loudspeaker to see if they would respond; they then played the song of the cactus
finch to cactus finch males to see if they would respond.
9. Explain the evidence presented in the film for your answer in question #8 above.
a. Males only came to the loudspeaker when the song of their own species was being played.
b. The type of song used more often during the breeding season was also the song sung by the
most abundant species.
c. During mating, birds sang the song of their own species.
Answer:
The correct answer is -
8. They played the songs of medium ground finches and cactus finches through a loudspeaker at different times, when individuals from both species were present, to see which species responded to each song.
9. Males only came to the loudspeaker when the song of their own species was being played.
Explanation:
To test the hypothesis that differences in finches song they sing keep these finches to breeding from other members of finches, Grant should play the different songs of both medium ground finches and cactus finches one by one in loudspeaker and see what members of finches respond on what song.
It will show that cactus fiches breed only on their songs and medium ground finches on their song if the hypothesis is true. Male of each species respond to their songs only and not on other song played on loudspeaker
Jill is planting a garden in her yard and notices that the fertilizer she is using contains gypsum. She learns that gypsum is a rock that is mined from underground and used to make fertilizer and other products. She remembers from science class that gypsum is rated a 2 on Moh’s hardness scale. Which of these describes this rock? Choose the two statements that apply.
A. It cannot scratch any other rocks.
B. It can scratch rocks that are rated a 1.
C. It is very soft compared to other rocks.
D. It is very hard compared to other rocks.
E. It can scratch any rock rated from a 2 to a 10, but not a 1.
Answer:
B and C
Explanation:
It can scratch rocks rated a 1 but not above a 2, the scale goes to 10 so it is very soft compared to other rocks.
Human blood type is determined by three alleles IA, IB, and IO. The alleles IA and IB are co-dominant to each other, and both are dominant to IO. Within a large, randomly mating population (540,000 individuals), the frequencies for the blood type alleles are 0.3 for the IA allele, 0.6 for the IO allele, and 0.1 for the IB allele. Calculate the expected numbers of people in the population having the blood type of A.
Answer:
1a. Number of people in the population with blood group A = 243000
1b. Number of people in the population with blood group B = 70,200
1c. Number of people in the population with blood group AB = 32,400
1d. Number of people in the population with blood group O = 194000
2. The percentage of type B people that are heterozygotes (IBIO) = 12%
Note: The question is incomplete. The complete question is given below:
Human blood type is determined by three alleles IA, IB, and IO. The alleles IA and IB are co-dominant to each other, and both ar e dominant to IO. Within a large, randomly mating population (540,000 individuals), the frequencies for the blood type alleles are 0.3 for the IA allele, 0.6 for IO, and 0.1 for the IB allele. a. Calculate the expected numbers of people in the population having each blood type A, B, AB, and O. b. 2. Determine the percentage of type B people that are heterozygotes (IBIO).
Explanation:
According to Hardy-Weinberg equilibrium equation, p²+q²+2pq=1
Where heterozygote allele 2pq,
p² = dominant h0m0zygous frequency
2pq = heterozygous frequency
q² = recessive h0m0zygous frequency
1a. Blood group A has two genotypes- IAIA and IAIO
The genotype frequency will be:
IAIA= 0.3 X 0.3 = 0.09
IAIO= 2 × 0.3 x 0.6 = 0.36
Total genotype frequency = 0.09 + 0.36 = 0.45
Number of people in the population with blood group A = 0.45 × 540,000 = 243000
b. Blood group has two genotypes- IAIB and IBIO
The genotype frequency will be:
IBIB= 0.1 x 0.1 = 0.01
IBIO = 2 × 0.1 x 0.6 = 0.12
Total genotype frequncy = 0.13
Number of people in the population with blood group B = 0.13 × 540,000 = 70,200
c. Blood group AB genotype frequency is 2 × IAIB x IAIB
Blood group AB = 2 × 0.3 x 0.1 = 0.06
Number of people in the population with blood group AB = 0.06 × 540,000 = 32,400
d. Blood group O has one genotype IOIO
IOIO = 0.6 × 0.6 = 0.36
Number of people in the population with blood group O = 0.36 × 540000 = 194000
2. Genotype frequency of heterozygote IBIO blood group = 2 × IB × IO
2 × 0.1 x 0.6 = 0.12 = 12%
The percentage of type B people that are heterozygotes (IBIO) = 12%
what is basement membrane? and what is it made up of ? in detail plss help
Which of the following are shown in karyotypes?
a
sex chromosomes
b
homologous chromosomes
c
autosomes
d
all of the above
Answer:
Karyotypes describe the chromosome count of an organism and what these chromosomes look like under a light microscope. Attention is paid to their length, the position of the centromeres, banding pattern, any differences between the sex chromosomes, and any other physical characteristics.
Explanation:
As this karyotype displays, a diploid human cell contains 22 pairs of homologous chromosomes and 2 sex chromosomes. ... The maternal and paternal chromosomes in a homologous pair have the same genes at the same locus, but possibly different alleles.
in engineering design which is a limit to what can be done
1. scope
2. criteria
3. process
4. constraints
Answer:4.constraints
Explanation:
Consider two pure-breeding lines of grapes, P1 and P2. The average diameter of P1 grapes is 1.2 cm and the variance is 0.30 cm2. The average diameter of P2 grapes is 1.6 cm and the variance is 0.56 cm2. The two pure-breeding lines are crossed to produce F1 progeny. Based on this description, which of the following statements is false?
a) VG for F1 is > 0
b) VP for P1 < VG for P2
c) VE for F1 is > 0
d) VG for P1 = 0
e) VG for P2 = 0
Answer:
a)
Explanation:
From the given information:
The avg diameters:
For P1 grapes =1.2 cm
For P2 grapes = 1.6 cm
Their vairance is also given as follows:
For P1 = 0.30 cm²
For P2 = 0.56 cm²
Recall that:
the phenotypic variance VP = genetic variance (VG) + environmental variance VE
As stated that P1 and P2 lines are pure breeding lines, which means that the diameter of the seed in F1 was around halfway between the two parents' and the difference in the F1 was close to the parents'.
This implies that, provided the parent lines exist as pure breeding;
The genetic variation would be absent, indicating that VG is zero.
∴
VP = VE and VG = 0
Now, averaging the results of two pure breeding lines, we have:
[tex]V_E = \Big (\dfrac{0.30 + 0.56}{2} \Big) \\ \\ V_E = \dfrac{0.86}{2} \\ \\ V_E = 0.43 \ cm^2[/tex]
The formula used in estimating F1 genetic variance can be expressed as:
VP = VG + VE
Recall that
VE = VP = 0.43 cm²
∴
0.43 = VG + 0.43
VG = 0.43 - 0.43
VG = 0
Thus, The statement that is false is in Option a.
VG for F1 is > 0
PLEASE HELP‼️ this is due in 5 mins.
A segment of DNA strand has the following bases:
TAC GAT
What is the complementary strand of mRNA?
A: UAG CAU
B: TAG CAT
C: ATG CTA
D: AUG CUA
Answer:
sorry if im lateeee. but its D!
Explanation:
When the cells start multiplying at an abnormal rate it leads to complications in our body.What could be the reason for this?Find Out
Answer:
the reason is often cancer.
Explanation:
cancer cells multiply rapidly and cause tumors
17. A terrane becomes part of a continent in a process called
a. rifting.
c. slab pull.
b. converging.
d. accretion.
8. Valves prevent blood from flowing backwards. Valves are located in the
O
veins
heart
heart and arteries
heart and veins
Answer:
Heart and artries
Explanation:
PLEASE MARK AS BRAINLIEST
Forensics
Plastic bags used as evidence containers after fires can produce dangerous gases.
A. True
B. False
Answer:
A. True
Explanation:
I took it on a test it's correct!
Answer:
This is definitely true
Explanation:
Which of the following is a function of the nucleus?
stores DNA
builds protein
stores sugars
packages proteins
Answer:
Stores DNA
Explanation:
Regulates activities in the cell and carries heredity information which is contained by genes and structures.
QUESTION 4
When the 'wind is knocked out of you", that air that was knocked out of you was actually part of your
O IRV
O ERV
ORV
O TV
name the process through which energy is Incorporated in the ecosystem?
Answer:
photosynthesis
Energy enters the ecosystem via sunlight as solar energy. Primary producers (a.k.a., the first trophic level) turn that solar energy into chemical energy via photosynthesis. Common examples are land plants, photosynthetic bacteria and algae
4
Select all the correct answers.
Which three human activities lead to a loss of terrestrial habitat?
conservation
farming
deforestation
construction
Reset
Next
Answer:
farming, deforestation, and construction
Explanation:
all of these options except conservation lead to poor environmental health. it's not conservation because to conserve means you are not wasteful and you conserve your resources.
Answer:
Farming, deforestation and construction all lead to the loss of terrestrial habitat. Conservation would be protecting terrestrial habitat.
Explanation:
What two body systems are most useful in getting nutrients from the food you eat to the cells in your body to assist in growth and development
A. Digestive and Nervous
B.circulatory and respiratory
C. Muscular and digestive
D. Digestive and Circulatory
Explanation:
(D.Digestive and Cilculatory are most useful in getting nutrients from the food we/you eat to the cells in your/my body to assist in growth and development....HOPE THIS HELP....TYPlease help i am giving brainliest
What is homeostasis?
A. the ability of an organism to maintain a relatively stable internal environment.
B. the production of a hormone by an endocrine gland that works on another endocrine gland
C. a series of events that monitor how hormones work in the body
D. a process in which a change in the environment causes a response that returns conditions
to their original status
No dam links
Answer:
A
Explanation:
Homeostasis is basically the organism being able to live without need of an outside source
Answer:
ok i answered the last one and yess i got it
What is homeostasis and how is it maintained?
Homeostasis refers to the body's ability to maintain a stable internal environment (regulating hormones, body temp., water balance, ect.). Maintaining homeostasis requires that the body continuously monitors its internal conditions.
Explanation:
hope it helps
The main difference between the gravitational force and electrical force is that
1. Gravitational force can only push
2. Gravitational force can pull and push
3. Electrical force can only pull
4. Electrical force can pull and push
The difference between the gravitational force and electrical force is that the electrical force can pull and push while the gravitational force is only attractive which means it can only pull.
What do you mean by Gravitational force?Gravitational force may be defined as a conservative force by which the earth allures other objects by mass.
The basic difference between both two forces is that the gravitational force can only attract masses, while electrostatic force either attracts or repel when two charges of the same sign are gathered.
Therefore, the correct option for this question is D.
To learn more about Electrostatic force, refer to the link:
https://brainly.com/question/17692887
#SPJ2
Which picture shown in figure b-3 is the most likely outcome
Answer:
The picture D is the outcome
AG CLASS NEED HELP ASAP
Which of the following refers to a plant that has been pruned and trimmed into a sculptural form?
topiary
hardscape
folly
bosquet
Answer:
I believe the ans is topiary.
Answer:
My Answer Is;
TopiaryTopiary is the horticultural practice of training perennial plants by clipping the foliage and twigs of trees, shrubs and subshrubs to develop and maintain clearly defined shapes, whether geometric or fanciful. The term also refers to plants which have been shaped in this way.
Explanation:
#CARRYONLEARNINGWhich nerves are the hair cells in contact with?
Answer:
Auditory nerve
Explanation:
Hair cells form synapses with bipolar neurons whose axons form the auditory nerve. Tips of the outer hair cells are attached directly to the tectorial membrane. When the inner hair cells move they make contact with the overhanging tectorial membrane
Fun fact: Hair and nials are made out of the same things!
can somebody please help me? :)