The largest taxon and consists of all the other taxis called

Answer:

Here my answer goes.......

Explanation:

In biochemistry, a kinase is an enzyme that catalyzes the transfer of phosphate groups from high-energy, phosphate-donating molecules to specific substrates. This process is known as phosphorylation, where the substrate gains a phosphate group and the high-energy ATP molecule donates a phosphate group.

Answer:

Some flowering plants have leaves that lack venation even though the stems and roots have vascular bundles.

Explanation:

Venation refers to the arrangement of the veins in the leaf of a plant which are involved in the transport of material in the plants.

The xylem present in leaves transports water to the leaf whereas phloem transports sugar from the leaves to different parts of the plants. In angiosperms, no plants are known whose leaves lack the veins but stem and root possess the vascular bundles.

Monocot is characterised by their parallel veins whereas dicots possess reticulate veins. Also, the compound leaves possess one of the three types of venation that are palmate, pinnate and dichotomous.

Since no angiosperm posses, veinless leaves, therefore, is the correct answer.

Answer:

Animals are multicellular eukaryotic organisms that form the biological kingdom of Animalia. With few exceptions, animals consume organic material, breathe oxygen, are able to move, can reproduce sexually, and grow from a hollow sphere of cells, the blastula, during embryonic development.

Explanation:

Scientists have recently estimated that there are approximately 8.7 million species on Earth. They believe that 1-2 million of those species are animals.

Answer:

A

Explanation:

An isolated system can NOT exchange energy or matter with it's surroundings. This is why it is isolated.

Answer:

This question lack options, options are:

A. Mutation

B. Evolution

C. Heredity

D. Reproduction

The correct answer is B.

Explanation:

Evolution is essentially a process of genetic change over time, that is, it is the result of accumulated changes in the composition of the gene pool. Variation is the raw material of evolution. Without genetic variation, evolution is not possible. The ultimate source of all genetic variation is mutation. A mutation is a stable and inheritable change in genetic material. Mutations alter the DNA sequence and therefore introduce new variants. Many of these variants are usually eliminated, but occasionally some of these variants can be successful and incorporated into all individuals of the species. Mutation is a factor that increases genetic diversity. This is how evolution explains the origin of various life forms as a result of changes in their genetic load. The inheritance of these variations through offspring of parents who carry the variation, although the genetic endowment of a single organism is the same throughout life, the genetic makeup of a species, understood as a whole (genetic background), changes throughout from many periods of life. Mutations and variability, the product of natural DNA recombination, provide diversity in the genetic material of a species.

Answer:

kinda like foraging a signature

Explanation: if I'm wrong go randonauting

Hello There!

Answer:

B. Gulf stream

Explanation:

Great Britain would have a much colder climate than it does if not for the gulf stream.

Answer:

Explanation:

Based on this the student is out if the focus, and just viewing on  the dust.Basically, high -power lens is a non oil immersion lens, with a short working distance  of 1cm,which  will be about  a few millimeters.Hence the student will be out of focus, just carry out a fruitless effort  focusing on the dust, missing the focus on the specimen.

Answer and Explanation:

There are many physical elements such as temperature, precipitation, humidity, altitude, vegetation, among others, that influence the presence of the insects that transmit the Chagas diseases. Its transmission seems to be enhanced by other social elements, such as the deficiency in basic services, lack of planning, the socio-economical conditions, cultural conditions. Altogether, these factors intervene in the presence of the Chagas disease, a systemic infection caused by the protozoa Trypanosoma cruzi. This protozoan is hosted by different wild and domestic mammals, transmitted to the human by hematophagous insects. The transmission occurs through dejections deposited on skin or mucose during or after the feeding process.  

Different rural areas in Central and South America are characterized by a mountain relief (temperatures between 15 and 30ºC - relative humidity between 50 and 90%), as well as by a plane relief associated with alluvial plain (temperature between 20 and 35ºC - media relative humidity of 75%). Vegetation in the mountain area provides a natural habitat to the triatomines, the insects that transmit the Chagas disease.  

Constant deforestation in mountains, soil move, the cutting down, firing, have destroyed the natural habitat of the insects, becomming the cause of their arrival to populated centers. As their environment is destroyed,    insects migrate to new areas and find refuge in precarious houses that surround the affected areas. Most of these houses have clay walls, a roof made of branches, and no floor. People that live in these conditions do not have economic resources.  Indexes of infestation in these houses are high due to the material used for their construction. Insects tend to establish near a source of food, such as domestic animals or even humans. It is also common that these houses have chicken coops and farmyards that also offer good conditions for the insects to live in.

Economic activities are important variables to consider, as these define the way of living in a population.  

Agriculture activities are performed with no control or planning. People deforest to plant, getting in contact with the insects' natural habitat, producing environmental changes, and getting in touch with them, enhancing the risks of being infected and of transportin the insects.

Answer:

The correct option is: "Either the pine trees or the spruce trees will eventually evolve into a new species."

Explanation:

There will be a competition between spruce trees and pine trees for nutrition and other resources from the environment to grow and spread since they are now occupying the same niche. Overtime, one specie will outlive the other by evolving into a specie that gives it an advantage over the other.  

Answer: bears

Explanation: it’s the answer

Answer:

I think It's A. Hope it helps! :)

Explanation:

Answer and Explanation:

b. stratum corneum: 5. layer including scalelike dead cells, full of keratin, that constantly slough off.

The most superficial epidermal layer conformed of squamous, plane, thin cells with keratin in their cytoplasm, that are continuously released. These cells are replaced by new cells that have the same destiny.      

d. stratum lucidum

: 1. layer of translucent cells in thick skin containing dead keratinocytes

Also known as the transparent layer, is only located in the thicker parts of the skin, such as the hands´ palms and the feets´ soles. This layer is so thin that the cells´ edges and some ties their nucleus can not be identified. Keratinocytes are diaphanous and are grouped together. They lack a nucleus and the cytoplasm is filled with a gelatinous substance, eleidin, which will transform into keratin.

b. stratum corneum and d. stratum lucidum 2. two layers containing dead cells.

c. stratum granulosum: 6. layer named for the numerous granules present.

These layer cells contain granules filled with keratohyalin that is needed for keratin production. These cells are arranged in two to four layers, and they begin to degenerate. This is why they show high lysosomes enzymes concentration. This is also the layer where it begins keratinization.

e. stratum spinosum: 10. layer that secretes a glycolipid that prevents water loss from the skin.

8 to 10 irregular cell layers. These cells are rich in DNA necessary for proteinic synthesis that ends in keratin production, and Langerhans cells that belong to the immunity system. This stratus is also known as "Malpigio stratum". It also produces a glycoprotein that helps to prevent water loss.    

a. stratum basale 4. epidermal layer exhibiting the most rapid cell division.

                             7. location of melanocytes and tactile epithelial cells.

Stratum basale is the innermost germinative, single, basal layer of the epidermis composed of basal cuboidal-shaped cells. These cells are the precursor of keratinocytes, this is why this layer is also called germinativum. In this basal layer, there are also Merkel cells as well as melanocytes.  The former associated with nerve fibers, transmit part of the touch, and the latter, form the pigment responsible for skin coloring and tanning, melanin.

f. papillary layer: 3. dermal layer responsible for fingerprints.

This stratum is a thin superior layer in the dermis. It has conjunctive tissues and blood vessels that nourish the skin and helps to control the temperature. It´s surface forms papilla that increases the mechanical union between dermis and epidermis.        

g. reticular layer: 9. deep layer of the dermis

The inner and thicker layer of the dermis. It is characterized by it´s thick, irregular bundles of collagen fibers and elastic fibers. These are not randomly oriented but forming the regular skin tightening lines known as Langer lines.  

h. epidermis as a whole: 7. location of melanocytes and tactile epithelial cells.

Composed of a plane stratified keratinized epithelium that constantly grows and maintains a normal thickness by the process of peeling. The Epidermis is made up of five cell layers, which have different functions: Stratum basale, stratum spinosum, stratum granulosum, stratum lucidum, and stratum corneum.        

i. dermis as a whole:  composed of conjunctive dense tissue that provides support, resistance, and thickness to the skin.        

Answer: Upwelling

Explanation:

Upwelling is a process of movement of dense, cold and nutrient rich water from the bottom of the ocean to the surface layers due to wind currents. This process replaces the warm and nutrient deficient water from the surface.

This process is useful for the growth of phytoplanktons and other sea plants growing in the surface layer of oceanic water.

Answer:

1) F, 2)True

Explanation:

1) autoclave uses steam

2) bleach dilute is 1:10

1. It is false that In a standard autoclave procedure dry heat is used combined with high pressure.

2.  It is true that Household bleach is routinely used in dilution 1:10

1. In a standard autoclave procedure, moist heat, not dry heat, is used in combination with high pressure. Autoclaves use steam under high pressure to achieve sterilization by destroying microorganisms and their spores. The high-pressure steam provides effective heat transfer and penetration, ensuring the sterilization of the items being processed.

2. Household bleach is often used in a dilution of 1:10, meaning one part bleach is mixed with nine parts water. This dilution is commonly recommended for various household cleaning and disinfection purposes. It helps to ensure effective disinfection while reducing the potential harmful effects of concentrated bleach.

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Answer:

sperm are produced in testes. sperm leaves through the semen duct. In the semen duct,fluids from the glands are added to the sperm. semenis releasedfrom the penis

Answer:

4    semen is realeased through the penis

1      sperm is produced in the testes

2      sper leaves the semen duct

3      fluids from the glands add to the sperm

Explanation:

Answer:

hey mate here is your answer

Answer:

Earth's temperature depends on the balance between energy entering and leaving the planet’s system. When incoming energy from the sun is absorbed by the Earth system, Earth warms. When the sun’s energy is reflected back into space, Earth avoids warming. When absorbed energy is released back into space, Earth cools. Many factors, both natural and human, can cause changes in Earth’s energy balance, including:

Explanation:

Variations in the sun's energy reaching Earth

   Changes in the reflectivity of Earth’s atmosphere and surface

   Changes in the greenhouse effect, which affects the amount of heat retained by Earth’s atmosphere

Answer:

The macromolecules;  protein helps to gain muscle, fat helps provide stored energy for longer period, carbohydrates provide immediate energy.

Explanation:

Proteins are the macromolecules that help on the muscle building and storage. Bodybuilders utilize proteins to build their body and muscle protein. Protein has equal energy value as carbohydrates.

Fat help in providing energy when there is no carbohydrate provided energy to utilize. In the winters some animals hibernate they utilize the fat provided energy during the hibernation period.

Carbohydrate gives energy immediately for the cellular process and also help athletes to provide energy immediately. Runners drink carbohydrates based drinks to get energy before the race.

Complete question:

A wild-type tomato plant (Plant 1) is homozygous dominant for three traits: solid leaves (MM), normal height (DD), and smooth skin (PP).

Another tomato plant (Plant 2) is homozygous recessive for the same three traits: mottled leaves (mm), dwarf height(dd), and peach skin (pp).

In a cross between these two plants (MMDDPP x mmddpp), all offspring in the F1 generation are wild type and heterozygous for all three traits(MmDdPp).

Now suppose you perform a testcross on one of the F1plants (MmDdPp x mmddpp). The F2 generation can include plants with these eight possible phenotypes:

solid, normal, smooth

solid, normal, peach

solid, dwarf, smooth

solid, dwarf, peach

mottled, normal, smooth

mottled, normal, peach

mottled, dwarf, smooth

mottled, dwarf, peach

Assuming that the three genes undergo independent assortment, predict the phenotypic ratio of the offspring in the F2 generation.

Answer and Explanation:

Cross 1:

Parental) MMDDPP  x  mmddpp

F1) MmDdPp

Cross 2: Testcross

Parental) MmDdPp   x   mmddpp

Gametes) MDP   MdP   MDp  Mdp   mDP   mdP   mDp  mdp

                 mdp   mdp   mdp   mdp   mdp   mdp   mdp   mdp

Punnet Square)

              mdp            

MDP     MmDdPp

MdP     MmddPp

MDp     MmDdpp

Mdp     Mmddpp

mDP     mmDdPp

mdP     mmddPp

mDp     mmDdpp

mdp      mmddpp    

F2) 8/64 = 1/8 MmDdPp, solid leaves, normal height, smooth skin

     8/64 = 1/8 MmddPp,  solid leaves, dwarf height, smooth skin

     8/64 = 1/8 MmDdpp, solid leaves, normal height, peach skin

     8/64 = 1/8 Mmddpp,  solid leaves, dwarf height, peach skin

     8/64 = 1/8 mmDdPp, mottled leaves, normal height, smooth skin

     8/64 = 1/8  mmddPp,  mottled leaves, dwarf height, smooth skin

     8/64 = 1/8  mmDdpp,  mottled leaves, normal height, peach skin

     8/64 = 1/8  mmddpp,  mottled leaves, dwarf height, peach skin

Another way of predicting the phenotypic ratio of the offspring in the F2 generation is by performing a testcross for each gene by separately and then multiplying their genotypic proportions. This is:

Leaves Gene

Parental) Mm  x  mm

Gamtes) M  m    m   m

Punnet Square)        M     m

                       m    Mm   mm

                       m    Mm   mm

F2) 1/2 Mm

      1/2 mm

High Gene

Parental) Dd  x  dd

Gamtes) D  d    d   d

Punnet Square)       D     d

                       d     Dd    dd

                       d     Dd    dd

F2) 1/2 Dd

      1/2 dd

Skin Gene

Parental) Pp  x  pp

Gamtes) P   p   p   p

Punnet Square)       P    p

                          p   Pp   pp

                          p   Pp   pp

F2) 1/2 Pp

      1/2 pp

To get the phenotypic ratio of the offspring we multiply the genotypic proportion for each trait by the genotypic proportions of the other two traits, like this:

solid leaves ratio -> 1/2

normal height ratio -> 1/2

smooth skin ratio -> 1/2

MmDdPp ratio: 1/2 x 1/2 x 1/2 = 1/8

MmddPp ratio: 1/2 x 1/2 x 1/2 x 1/2 = 1/8

MmDdpp ratio: 1/2 x 1/2 x 1/2 x 1/2 = 1/8

Mmddpp ratio:  1/2 x 1/2 x 1/2 x 1/2 = 1/8

mmDdPp  ratio: 1/2 x 1/2 x 1/2 x 1/2 = 1/8  

mmddPp ratio: 1/2 x 1/2 x 1/2 x 1/2 = 1/8

mmDdpp ratio: 1/2 x 1/2 x 1/2 x 1/2 = 1/8  

mmddpp  ratio: 1/2 x 1/2 x 1/2 x 1/2 = 1/8                    

Answer:

Their experimental design lacks control group

Explanation:

Based on what I read, the scientists don't have a control group as one of the main groups thus they cannot, in scientific sense, say that the medicine is better or worse. You always need a control group receiving no intervention because then we can compare groups and assess the effectiveness of that intervention (in our case if we had control group vs people who received the medicine, we could see if the people who received the medicine had improved condition etc when compared to participants who did not receive anything)

There is no control group in their experimental design. According to what I've read, the scientists don't have a control group as one of the primary groups. Thus, option C is correct.

To determine if the treatment is better or worse in a formal scientific sense. You should always have a control group that does not receive any treatment because this allows us.

To compare the groups and evaluate the effectiveness of the intervention. In our case, if we had a control group and participants who did not receive any treatment, we could see if those participants had better health overall.

By focusing on the impact of a single independent variable, a cause-and-effect link can be established.

The independent variable is altered in the treatment group while being held constant in the control group by researchers. The findings of these groups are then compared.

Therefore, no control group in their experimental design.

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Answer:

The genotype could be BB or Bb

Explanation:

The genotype could be Bb which means it has heterozygous alleles.

The B which is allele for dark brown fur is dorminant and b for light brown is recessive. In this case, the dorminant allele masked the effect of the recessive allele b which make the dorminant allele B to be expressed phenotypically.

Answer:

The correct answer is "The similar ordering of homeotic genes in animals, both vertebrate and insect, is due to ancient homology".

Explanation:

The missing options of this question are

a. Homeotic genes show that insects and vertebrates are closer relatives than the traditional classification system indicates.

b. The similar ordering of homeotic genes in animals, both vertebrate and insect, is due to ancient homology.

c. The similarity is a coincidence, not documented in other invertebrates and largely a result of random mutations.

d. Homeotic genes of different animal lineages might be ordered in a similar fashion, yet their sequences are completely different.

The correct answer is option b. "The similar ordering of homeotic genes in animals, both vertebrate and insect, is due to ancient homology".

Ancient homology, is a concept proposed by Charles Darwin that explains that species have homologous structures because they share a common ancestor. This explains as well why the ordering of some homeotic genes on vertebrate chromosomes parallels the ordering of homeotic genes on fruit fly chromosomes. Even though vertebrates are not as evolutionary close to fruit fly as other species, they share an ancient common ancestor as well. This same phenomena explains other homologies seeing in species, such as the adaptive mimetic diversity across butterflies.

Answer:

I hoped I helped :))))

Explanation:

A. Extracellular Fluid

B. Hydrophilic Heads

C. Integral Protein

D. Hydrophobic Tails

E. Cytoplasm

F. Carbohydrate

Answer:

The mitotic spindle was “ blocked ” by the action of the antibodies that bind to tubulin.

Explanation:

The tubulin heterodimers consist of α- or β-tubulin structures that form the microtubules, which represent the cytoskeletal of eukaryotic cells. During mitosis, the microtubules are arranged in order to form the mitotic spindle, this structure is critical for the segregation of homologous chromosomes during Anaphase.

Interphase microtubules are required for attaching chromosomes in the middle of the cell during its division, thereby it is expected that the antibodies bind to these microtubules during this process.

The contractile ring is formed by approx. 20 actin filaments that encircle the middle of dividing cells, thereby it is expected that these antibodies are specific of tubulin heterodimers.

Answer:

a condition, an action, or a relationship.

Explanation:

Answer:

forest fires

Explanation:

An environmental change that occurs quickly and affects organisms immediately (causing behavioral adaptations).

floods, forest fires, blizzards, volcanic eruptions,

Answer: Forest fires[A]

Explanation:

got 100% on the edge2020 Unit Test

have a good day:)

Answer:

A.

Explanation:

because the climax community is composed of species beat adopted to average conditions in that area

When the community climax in an ecosystem has only a single type of climax, the development of the climax community is controlled by the climate of that region. Option A is correct.

The climate of a region is the most important factor that controls the development of a climax community. The climate determines the temperature, precipitation, and other abiotic factors that influence the growth and survival of plants and animals.

In a region with a single type of climax community, the climate is relatively uniform and there is little variation in the abiotic factors. This means that the same species of plants and animals will be able to survive and thrive in the region, regardless of the specific location. The life forms, soil texture, and pioneer community can all influence the development of a climax community, but they are not as important as the climate. Option A is correct.

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Answer:

They can be found in several trophic levels, as they are related with several trophic level, hence, they cannot be placed on a specific trophic level.

Explanation:

A trophic level is a specific position occupied by a group of organisms on a good chain in relation to their nutrition.

Dentrivores feed on the waste of other organisms and cannot be really placed on a specific trophic level, likewise decomposers, of which they feed and decompose the body of organisms.

Omnivores feed on both plants and animals, which includes producers and consumers. Placing omnivores on a specific trophic level would not be really straightforward also.

Answer:

The correct answer is - The cranial nerves and the spinal nerves.

Explanation:

The central nervous system or CNS includes the brain and the spinal cord of the nervous system where it takes sensory information, integrates, and responds accordingly. The spinal cord acts as a conduit for signals between the brain and the rest of the body.

Spinal nerves and crania; both play an essential role in taking sensory information and respond accordingly. Spinal nerves are nerves that help in sending motor, sensory, and autonomic signals between the CNS and the body. The cranial nerves supply information to the CNS and then from the CNS to the body.

Thus, the correct answer is - The cranial nerves and the spinal nerves.

Answer:

1.false.

There are special lense tissues for this which will not scratch the lense so that  the focal power will nit be affected. Grit -free lens paper,Kimwipes or Kodak lens are ideal cleaning  materials.

2.This is also false. Microscope should be covered with dust cover, and even in the cabinet,It should never be left without am eyepiece.

3.True.

This gives he lowest magnification, which allows for wide view of the specimen in order get the specific spot to focus on.It has  magnification power  of 10x eyepiece  lens.Thus a 4x scanning objective lens therefore  gives  total magnification of 40x.

4.False,

This will break the objective lens.Fine adjustment knob should be use.This will gives the sharpest focus,using a coarse knob will crack the lens because the working distance for focusing will be too small, and suing this will damage the objective lens,

5.False,only the wet mount should be used.High power and oil lens should not be used as this will reduce the efficiency of the microscope.