Answer:
can lead to natural selection
Explanation:
Unequal reproductive success _can lead to natural selection_____.This is because if there is unequal reproductive success then one of the organisms is better suited for reproducing, surviving, and passing down their genes to their offspring rather than the organism who is unfit. This is where natural selection comes into play because natural selection is process where individuals better suited for their environment produce more and have better survivality.
So overtime, the organism which is weaker (in sense of fitness) (here fitness relates to reproduction and survival), will not pass as many genes and won't survive, whereas, individual better suited will, hence in a way "Nature selected" the better fit organism.
Which of the following characteristics cannot be influenced by the environment? A. Chance of having diabetes B. Metabolism C. Natural eye color D. Height
Answer:
The answer is option C.
Hope this helps you
Answer:
C. natural eye
Explanation:
Why is the frequency of natural disasters increasing? Select one: a. There are less natural hazards occurring. b. Human population in areas prone to natural hazards has increased. c. Deaths from natural disasters has decreased in developed countries and increased in developing countries.
Answer:
I hope option c is the correct answer.
Explanation:
As for option 1 its totally in correct. for option 2 human population is not always greater in the disaster places.for option three developed countries are developed with all the determined factors but developing countries dont see all the factors as they destroy nature while making road which causes landslide, which causes death.Hope it helps...
Answer:
Option C
Explanation:
I believe Option C is the correct answer
Some people say that plants make their own food from the Sun through the process of photosynthesis. Based on
the law of conservation of energy, is this description accurate? Explain your response.
Answer:
No, it’s not accurate. The law of conservation of energy states that energy can’t be created or destroyed. Plants transform light energy from the Sun into chemical energy through the process of photosynthesis.
Explanation:
plato
Yes, based on the law of conservation of energy, the description is accurate because plants convert light energy into chemical energy.
What is photosynthesis?Photosynthesis is the process of making food. It occurs in plants and organisms with chlorophyll, like plants, algae, etc. These organisms convert light energy from the sun into chemical energy.
Here, the law of conservation of energy says that energy can not be created or destroyed, it can only be transferred, the same happens in photosynthesis. The light energy from the sun converts into chemical energy.
Thus, Yes, the description fits according to the law of conservation of energy since plants turn light energy into chemical energy.
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Covalent modification:_____.
a. can involve the addition of phosphate groups.
b. can activate an enzyme.
c. produces modifications that can sometimes be reversed.
d. affects the activity of an enzyme by adding or removing a chemical group.
e. all of these are correct.
Answer: Option E.
All is correct.
Explanation:
A. can involve the addition of phosphate groups.
b. can activate an enzyme.
c. produces modifications that can sometimes be reversed.
d. affects the activity of an enzyme by adding or removing a chemical group.
Because Covalent modifications are enzymes catalyzed changes in the production of protein that involve the removal or addition chemical groups.
Covalent modifications can target a single or many Amino acids and it will alter their chemical properties.
Addition of phosphate group is a covalent modification because it control enzymes activity.
Covalent modification is reversible because it involves addition or removal of phosphoryl group to enzymes.
covalent attachment of another molecule can affect the activity of enzymes and many other proteins. In these occurence, the molecule that act as donor provides a functional moiety that modifies the properties of the enzyme.
3) Because cardiac muscles are mechanically, chemically, and electrically connected to one another, cardiac muscle tissue functions like a single enormous muscle cell. For this reason, it is called a functional ________.
Answer: FUNCTIONAL SYNCYTIUM
Explanation: The cardiac muscles are the Pericardium (outermost), Myocardium (middle) and Endocardium (innermost) though three(3) in number but they work as a unit,this functional unit starts with the action of the pacemaker cells,the Sinoatrial nodes,Atrioventricular nodes, bundle of his,bundle branches/purkinjes fibers.
The contraction of the heart muscles relies on impulses from the nervous system and the contraction is coordinated and rapid inorder to bring about a uniform conduction of blood into, through and out of the heart.
what is the function of cellulose in plants
Cellulose helps make a plant strong and stiff, so it doesn't bend and break. It is in a plants cell walls.
Evolution is change in a population over time and includes the gene pools of that population. How does biogeographic isolation allow for the change of gene pools over time?
Biogeographic isolation affects the random changes that take place within gene pools.
Biogeographic isolation causes changes in gene pools that result from populations being separated.
Biogeographic isolation determines who will win competition for mates.
Biogeographic isolation determines the time that populations will breed
Answer:
Biogeographic isolation causes changes in gene pools that result from populations being separated.
Explanation:
Biogeographical isolation consists in the separation of a population by a geographical barrier, giving rise to subpopulations.
With isolation, the subpopulations start to suffer different pressures from the environment and consequently the selected genes in one subpopulation will be different from the other subpopulation.
Due to the biogeographic isolation, the two subpopulations will be prevented from crossing and the differences between them will become more and more accentuated, and with that the subspecies appear.
Over time, these subspecies may become so different from each other that reproduction between them becomes impossible.
When this happens, reproductive isolation occurs and, consequently, the emergence of new species. When speciation occurs due to geographic isolation, it is called allopatric speciation.
Answer:
Biographic isolation causes changes in gene pools that result from populations being separated.
Explanation:
I took the test
Which of the following is the most accurate definition of a gene?
Answer:
A gene is a segment of a DNA molecule that directs the development of some inherited traits.
Explanation:
If the amount of daylight increases plant growth during the summer
Answer:
then, the amount of daylight decreases plant growth in the winter.
Explanation:
Well if plant growth is increased during summer due to the amount of daylight then it will be reduced or decreased during winter because of reduced daylight.
Arrange the following levels of organization starting from smallest and going to the largest.
A. Habitat
B. Biosphere
C. Climate zone
D. Ecosystem
Answer:
-Habitat
-Ecosystem
-Climate Zone
-Biosphere
Answer:
The person above me is wrong.
Correct Answer:
1. Biosphere
2. Biome
3.Ecosystem
4. Habitat
Explanation:
Dentre as alternativas a seguir,a única que é uma mistura é: ( )Um átomo de oxigenio ( )Àgua destilada ( )O ar atmosférico ( )O gás ozoio me ajudem por favor...
Answer:
Atmospheric air
Explanation:
Atmospheric air is a mixture of nitrogen, oxygen, argon, and small amounts of other gases.
A is wrong. A flask of oxygen atoms has nothing else in it. The O atoms are a pure substance.
B is wrong. A flask of distilled water contains only water. The water is a pure substance.
D is wrong. A flask of ozone contains only ozone. Ozone is a pure substance,
1. Hen recommending solutions to decrease human impact, which location were you able to make the greatest positive impact? Please explain your selection by using data from the simulation.
The cubes below are models of cells made of a jellylike material. One cube is
intact, and the other has been cut into eight smaller cubes
1 cm
1 cm
Which statement is true for these models?
O A. The smaller cubes have less total volume than the large cube.
B. There is more surface area with the one large cube than with the
eight smaller cubes,
C. There is more surface area with the eight smaller cubes than with
the one large cube.
D. The smaller cubes have more total volume than the large cube.
C. There is more surface area with the eight smaller cubes than with
the one large cube.
This applies to our body when we refer to cells , when there needs to be more surface for the same volume
Damage to Schwann cells would result in Group of answer choices loss of the structural framework of the brain decreased speed of conduction ability to produce scar tissue at the site of an injury increased axoplasmic flow
Answer: decreased speed of conduction.
Explanation:
Schwann cells are type of cells of the peripheral nervous system that produce myelin sheath around neurosonal axons thereby increasing the saltatory function of neurons.
If Schwann cells are damaged it result in blockage of electric conduction which will produce secondary demeylination and resulting in shock or toxic immune shock.
Schwann cells produce myelin sheath will help to increase saltatory conduction but when it is damaged it will decrease conduction and result in shock.
Levels of Organization of Living Things
Answer:
organelles, cells, tissues, organ and organ system,
Observe 5 different forms of life in your garden, orchard, living beings found with their characteristics and give an explanation of these forms.
Answer:
Explanation:
After going to my garden and observing carefully I have come to the conclusion that there are many forms of life.
The most common way of life is plants: which are mostly green, give us oxygen and some give us fruit or food.
Other forms of life that I observed were:
Birds: vertebrate animals that live on the fruits of trees, sing in the morning and have plumageThe worms: invertebrate animals that serve as compost for the earth. Ants, insects that work in an orderly way and that live in colonies under the ground.Flies, flying insects that help decompose animals.Write down the three characteristic features of human blood
Which is a structure that directs the cell's activities? nucleus Golgi apparatus ribosome mitochondrion
Answer:
Nucleus
Explanation:
Nucleus controls cells' activities by controlling the synthesis of proteins.
Golgi apparatus involves in the secretion and intracellular transport of a cell.
Ribosome helps the synthesis of proteins only.
Mitochondrion involves in respiration, generating energy for the cell.
Answer:
Explanation:
nucleus:)
Which statement best describes a cause and its effect that occurs during the process of muscle contraction?
Answer:
Muscle contraction can be explained by sliding filament theory.
1. Activation of muscles: the motor nerve generates an impulse to transfer signals from neurons to neuromuscular junction. This stimulates sarcoplasmic reticulum to release calcium into the muscle cells.
2.Contraction of muscles: calcium in the muscle cells binds with troponin causes actin and myosin to bind. Actin and myosin in the muscle binds and contract by utilizing ATP as a source of energy.
[Blank] is a protein found in blood that is represented by a + or - sign, which affects the compatibility of blood with other blood types.
A) Rhesus factor
B)Antigen factor
C)Antibody factor
Answer:
the answer is rh factor.
Explanation:
Rh factor is known as the class of antigen or protein found on the rbc
If the protein is present, then the person is said to be Rh positive and when the protein is absent the person is said to be Rh negative.
Rhesus factor is present on the outside of red blood cells plasma membrane
what are the advantages of modern cutting crops
Answer:
the advantages of using modern technology
more yield of cropseasy farmingmore varieties of cropsfruits and vegetables are available all year round
Name The carbon-containing compounds produced by an engine that burns hydrocarbon fuel
Answer:
Hydrocarbon combustion
Explanation:
Carbon monoxide(CO) Carbon dioxide(CO2), but mostly carbon dioxide
which condition need to be in balance for cells to function
Answer:
homeostasis
Explanation:
In biology, homeostasis is the state of steady internal, physical, and chemical conditions maintained by living systems. This is the condition of optimal functioning for the organism and includes many variables, such as body temperature and fluid balance, being kept within certain pre-set limits (homeostatic range).
step-by-step plan for dealing with a chemical splashed in your eyes.
Explanation:
go to the nearest eye wash station open ur eyes and let the water wash out the chemicals.
Why
are
fungi classified as heterotrophs like animals?
Answer:
Fungi is heterotypic animal because it takes its diet from its food chain like other animals.
Explanation:
Like animals fungi are also heterotrophs. Fungi use the complex compound in the form of carbon rather then fixing of carbon dioxide from the environment.
Most of the plants and some bacteria do the same things. Fungi does not fix nitrogen as well from the environment. Like other animals fungi takes other nutrients such as from diet. Some of the fungi multiply a-sexually and some fungi do have a-sexual and sexual reproduction with the alternation of generation. The fungi is used to commercial food industry to make the yeast for baking, brewing and for making cheese and wine. It is used for fermentation. It is also use in the form of enzymes and bacteria.
Is it organic or not organic
List the conditions necessary to provide food for a large population.
Answer:
The necessary condition are the following:
1) One should have enough money to buy the food.
2) One should have enough crops.
3) The distribution of food must be equal.
4) The economy should be high
5) The management should be proper.
6) There should be no discrimination of people in providing food.
Answer:
The conditions necessary to provide food for a large population:
⇒ The large population should be high in economy.
⇒ The large population should have people who can afford food without any difficulties.
⇒ The large population must have plentiful of crops and farmers willing to grow them.
⇒ The area should have enough food to feed the whole population.
⇒ The food can be distributed easily to everyone in the large population.
A sodium atom that has lost an electron comes near a chlorine atom that has gained an electron. What happens?
A. They form a peptide compound.
B. They form a covalent bond.
C. They form a hydrogen bond.
D. They form an ionic bond.
Answer:
The answer is D.
Explanation:
When metal react with non-metal, it will form an ionic bonding.
(Correct me if I am wrong)
A sodium atom that has lost an electron comes near a chlorine atom that has gained an electron. Then they form an ionic bond.
So, option D is correct one.
What is ionic bond?The bond formed by complete transfer of electron/electrons between atoms is called ionic bond. The ionic bond generally formed between metals and non-metals elements.
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Gene expression patterns can be used to test hypotheses based on morphology. For example, the regulatory gene Bapx1 is expressed in the hinge of the developing lower jaw in fishes and reptiles. Where would you predict Bapx1 expression to occur in mammals?
A. in the developing cheekbone
B. in the developing lower jaw
C. in the mature lower jaw
D. in the developing ear bones
Answer:
The correct answer is option D. "in the developing ear bones".
Explanation:
The developing lower jaw of fishes and reptiles has a variety of bones that are joined together, forming the mandible that they use to eat their preys. Some bones in the developing lower jaw of fishes and reptiles are equivalent to the developing ear bones of mammals. Therefore we can predict that the Bapx1 expression in mammals will occur in the developing ear bones. About this evolutionary relationship, scientist Zhe-Xi Luo of the Carnegie Museum of Natural History in Pittsburgh states "Reptiles have [a] jaw full of ear bones from mammals and mammals have an ear full of jawbones of reptiles".
If a cell has 32 pairs of chromosomes in its diploid state, how many chromosomes will it have after Meiosis 1? A. 8 B. 64 C. 32 D. 16
Answer:
option c is correct that is 32
Explanation:
meiosis occur in two phases in the first phase DNA replication occur and amount of DNA becomes doubled without any changes in the chromosomes number and two daughter cells( each 2n) are formed
now in stage 2 each daughter cell undergoes mitosis with the formation of two cells each with half chromosomes (n)
now 2n =32
n=32/2=16
after meiosis stage 1 ........ two daughter cell each with 32 chromosomes
stage 2.... each daughter cell form two grand daughter cell each with 16 chromosomes
A cell with 32 pairs of chromosomes will have 32 chromosomes after meiosis I
WHAT IS MEIOSIS?
Meiosis is a cell division that results in the formation of four daughter cells that have their chromosomal number reduced by half i.e. from diploid (2n) to haploid (n). Meiosis occurs in a two step division process namely: meiosis I and meiosis II. Meiosis I involves the separation of homologous chromosomes while meiosis II involves the separation of sister chromatids.The actual reduction in chromosome number takes place in meiosis I. Hence, a cell with 32 pairs of chromosomes i.e. 64 chromosomes will have (64 ÷ 2) = 32 chromosomes after meiosis I.
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