Please help asap with 18

Answer:

•Protection of internal organs

•Provide for muscle attachment and movement

•Structural support

The following that are functions of the exoskeleton are:

An exoskeleton is an outer skeleton that is present outside the body of some insects and other organisms. The exoskeleton is made up of hard substances like calcium carbonate or chitin protein.

The exoskeleton protects the soft tissues and organs of organisms. They are helpful in saving the organism from predators and other factors of the environment.

The exoskeleton is present in most arthropods. They also help in reducing water loss from the body.

Thus, the functions of the exoskeleton are:

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Answer:

Its C

Explanation:

DNA from 2 parents, 24 from each parent is combined into one with 48 chromosomes. Hopefully, that makes sense and is correct.

Answer:

Please find the summary of what happens during DNA replication below

Explanation:

DNA replication is the process by which a DNA molecule is duplicated into two identical copies. It occurs in the nucleus of the cell prior to any cellular division. The process includes:

- The double stranded DNA is first unwound by an enzyme called DNA HELICASE into a replication fork consisting of two single strands of DNA.

- Another enzyme called DNA POLYMERASE binds to the DNA and begins to add NUCLEOTIDES to each strand using complementary base pairing rule i.e. A-T, G-C. To do this, short sequences of RNA called PRIMER are synthesized by an enzyme called PRIMASE, which serves as building block for DNA polymerase to act.

- However, DNA POLYMERASE can only work in the 5'-3' direction i.e. on the leading strand which runs from 3'-5' direction. Short pieces of DNA called OKAZAKI fragments are synthesized on the lagging strand, which runs from 5'-3' direction.

- An enzyme called LIGASE joins the okazaki fragments together into a whole DNA on the lagging strand.

After the replication process which follows the SEMI-CONSERVATIVE MODEL of replication, each DNA molecule will contain one old strand called PARENT STRAND and one NEW strand.

Answer:

The Loop of Henle serves to create a concentration gradient throughout the nephron which helps increase the reabsorption of water and certain ions. In the thin descending limb, water is very permeable and is reabsorbed due to the existing concentration gradient in the medulla.

Answer:

In endothermic reactions, more energy is absorbed when the bonds in the reactants are broken than is released when new bonds are formed in the products. Endothermic reactions are accompanied by a decrease in temperature of the reaction mixture.

Answer:

190 ATP molecules

Explanation:

Cellular respiration is the process whereby energy (ATP) is obtained in the cells of living organisms by breaking down glucose molecules. Cellular respiration can either be aerobic or anaerobic depending on whether oxygen is present or not.

In the presence of oxygen, aerobic respiration, which consists of three stages namely: glycolysis, Krebs cycle and oxidative phosphorylation, is employed. Per glucose molecule;

- Glycolysis produces 2 ATP molecules,

- Krebs cycle produces 2 ATP molecules

- Oxidative phosphorylation produces 34 ATP molecules

Hence, in total, 38 ATP molecules is produced per glucose molecule in aerobic respiration. According to the question, 5 molecules of glucose will yield 5 × 38 = 190 molecules of ATP.

Answer:

should be 4

Explanation:

plants cant do photosynthesis without sunlight

Because Earth has limited materials and room for deceased creatures, biogeochemical cycles are vital to life and ecosystems. Biogeochemical cycles transport and store these chemicals for living creatures.

Because there is a finite quantity of stuff on earth and a certain amount of room for dead species as well, biogeochemical cycles are crucial for life and significant to ecosystems. Additionally, biogeochemical cycles are crucial because they move and store these chemicals so that living things may use them.

The flow of nutrients and other elements between biotic and abiotic forces is referred to as "biogeochemical cycles" in most cases. The words "bio" and "geo," which refer to the biosphere, "geo" and "chemical," which refer to the elements that flow through a cycle, are the roots of the phrase "biogeochemical."

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Answer: 6 cells, 16 chromosomes each.

Explanation:each cell, after meiosis produces two haploid cells.

three diploid cells (2n=32) after meiosis give six haploid cells

Answer:

D

Explanation: its the most theorital and  logical reason.

Answer:

If hydrogen peroxide is not broken down by catalase, additional reactions convert it into compounds called reactive oxygen species that can damage DNA, proteins, and cell membranes. ... A shortage of this enzyme can allow hydrogen peroxide to build up to toxic levels in certain cells

If hydrogen peroxide is not broken down by catalase, it can be converted into reactive oxygen species, which can damage DNA, proteins, and cell membranes.

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Answer:

it is c on 1 D on 4 A on 2 and Bon 3

Answer:

Meiosis end ups with half the no. of chromosomes..

Answer:

Meosis

Explanation:

Meosis 1 ends with 2 diploid cells that end up dividing again into 4 haploid cells.  Thus, the end result of meosis is 4 haploid cells with 23 chromosomes each.

CFCs and other halogen-source chemicals in the stratosphere were discovered to deplete the ozone layer.

Ozone depletion is the steady lowering of the Earth's ozone layer in the high atmosphere, which is produced by the discharge of chemical compounds from industry and other human activities that contain gaseous chlorine or bromine.

The ozone layer acts as a buffer against the sun's potentially dangerous ultraviolet rays. The destruction of the ozone layer puts humans in direct contact with dangerous ultraviolet rays, which can lead to a variety of health problems including cancer, cataracts, skin illnesses, and a weakened immune system.

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Explanation:

The correct answer is B. If there was an increase in nest sites, the pigeon population would increase. This would of course be due to the greater amount of space in which the pigeons could breed and raise their offspring.

So answer is B

Thank you all......

Answer: It is B I just took the quiz

Explanation:

Explanation:

Threshing- The process of separating grains from the harvested crop is called threshing.

winnowing-The grain is separated from the chaff with the help of wind is called winnowing.

Sieving- Sieving is a simple technique for separating particles of different size.

Answer: The answer is flammability

Explanation:

because it is a chemical thing happening

Answer:

dddďdddddddddddddddddddddd

Answeer: cell state

Explanation:

Answer:

Explanation:

The observable traits expressed by an organism are referred to as its phenotype. An organism's underlying genetic makeup, consisting of both physically visible and non-expressed alleles, is called its genotype.

Answer:

d. Pluripotency markers  

Explanation:

Pluripotency can be defined as the capacity of individual cells to differentiate into any cell type. Pluripotent transcription factors are pluripotent proteins that promote the differentiation of embryonic stem cells (ESCs) into stem/progenitor cells by inducing the expression of target genes, which are also capable of maintaining their pluripotent state. For example, SOX2, OCT4 and NANOG are pluripotent transcription factors highly expressed in ESCs in order to maintain the pluripotent state of these cells.

Answer:

D

Explanation:

The statement provides the strongest explanation for the trends in the two populations is predator-prey relationships act as density-dependent limiting factors on both predators and prey. Hence option D is correct.

Predator is defined as an organism that mostly hunts and consumes other organisms for food. The term "predator" refers to a species that hunts and eats specific other organisms. The animals that predators consume are referred to as prey.

Predator-prey interactions and prey-predator interactions are both crucial density-dependent population controls. The other population's size determines how each population changes in size.   When the population density reaches a particular point, a density-dependent limiting factor takes effect. Competition, parasitism, and disease are other instances of density-dependent limiting variables.

Thus, the statement provides the strongest explanation for the trends in the two populations is predator-prey relationships act as density-dependent limiting factors on both predators and prey. Hence option D is correct.

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Answer:

Man no.3

Explanation: Mother A positive and daughter AB negative means that the dad would be AB positive.