1. This phylogenetic tree was constructed by comparing sequences for a homologous gene involved in development. Select the correct statement.
A. A phylogenetic tree containing two main branches for evolutionary relationships among the animals.
B. The first branch leads to Drosophila.
C. The second branch divides into two branches, 2a and 2b. Branch 2a leads to Lancelet.
D. Branch 2b divides into two branches: 3a and 3b. Branch 3a leads to Zebrafish.
E. Branch 3b divides into two branches: 4a and 4b. Branch 4a leads to Frog.
F. Branch 4b divides into two branches: 5a and 5b. Branch 5a leads to Chicken.
G. Branch 5b divides into two branches leading to Human and Mouse, respectively.
2. This phylogenetic tree was constructed by comparing sequences for a homologous gene involved in development. Select the correct statement.
A. The common ancestor of a human and a frog and the common ancestor of a mouse and a chicken lived at the same time.
B. The nucleotide sequence of this gene in a mouse is more similar to the sequence in a chicken, and both are less similar to the nucleotide sequence of this gene in a frog.
C. A frog is the ancestor of both a mouse and a chicken.

Answer:

option A is correct

Explanation:

Answer:

Explanation:

 (a) Dry apricots when placed in pure water swell due to osmosis and when in sugar water, they shrink again.

(b) When a Red Blood Cell is placed in concentrated saline solution exosmosis occurs and the RBCs shrink due to excess loss of water.

(c) Breaking of the plasma membrane leads to the scattering of the ceil organelles as it forms the basic supporting unit of the cell.

(d) When Rheo leaves are boiled in water first and then a drop of sugar syrup is put on it, osmosis does not occurs, due to the death of the cells of the leaf. This shows that selective permeability is property of living plasma membrane.

(e) Golgi complex helps in the package, storage and transfer of proteins synthesized by ribosomes. Thus, when ribosomes are removed the cell will not function properly

Answer

1:2:1

Please  check the file,due to technical reasons there was issues  with submission

Explanation:

Answer:

zone 3

Explanation:

Answer:

C

Explanation:

Answer:

A primary consumer that obtains its energy from the consumption of plants

Explanation:

Organisms that eat the producers are the primary consumers. In this case, the producer is the grass, which is then eaten by the primary consumer, the meadow vole.

Answer:

Platypus is an mammal.

Explanation:

Because platypus cannot fly, and lays eggs. It does not live in nests, but in holes on the ground. The parents platypuses can have venom but the smaller ones do not have venom. This is why they are threatened by other animals.

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Answer:

Density, [tex]d=0.82\ g/cm^3[/tex]

Explanation:

It is given that,

Mass of unknown liquid is 20.5 kg

Volume, V = 25 mL

We know that, 1 mL = 1 cm³

25 mL = 25 cm³

The density of the substance is equal to its mass per unit volume. So,

[tex]d=\dfrac{m}{V}\\\\d=\dfrac{20.5\ g}{25\ cm^3}\\\\d=0.82\ g/cm^3[/tex]

So, the density of this substance is [tex]0.82\ g/cm^3[/tex].

Answer:

0.82

Explanation:

just took test

The dark organelles labelled E is called the Ribosomes.

Answer:

C

Explanation:

Edge 2020

Answer:

(In explanation)

Explanation:

 The heat from the earth's core causes convection currents in the air under the earth's crust, causing the tectonic plates to shift/ move.

Answer:

Passive transport.

Explanation:

Osmosis occurs in the cell which is a type of passive transport. Passive transport refers to the transfer of solutes from one place to another without the expenditure or use of energy. Osmosis refers to the transfer of solutes from outside the cell into inside the cell through a semipermeable membrane which allow solutes which are small in size. This process occurs only when the concentration of solute is different inside and outside of the cell. while active transport is a type of transport which transfer solutes from one place to another with the use of energy in the form of ATP.

Answer:

Wealthy people who supported the party were concentrated in cities.

Explanation:

Answer:

Explanation:

Explanation:

The different steps which are involved in biological method are the the invasion, the rapid division followed by the spread of infection. ... Malaria results in infection after the bite of the female anopheles mosquito. The parasites enter the bloodstream. as a result of this there is predominant infection.

Answer:

It was ROBERT HOOKE who discovered micro organisms and it was discovered in the period 1665-83 two fellows of the royal society.

Explanation:

In 1665 Hooke presented the first published depiction of micro organism.

Hope all these facts help.

The answer is A

Electron micrograph pictures showing a blue center surrounded by 2 layers.

A. Electron micrograph pictures showing a blue center surrounded by 2 layers.

The plasma membrane, or the cellular membrane, gives safety for a mobile. It also gives a fixed surrounding in the mobile. And that membrane has numerous distinctive features. One is to move nutrients into the cell and additionally transport toxic materials out of the cell.

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Answer: Gene expression

Answer:

the second one

Explanation:

there are only 2 sex linked chromosomes and that is X and Y

The true statement when describing sex-linked inheritance is ; ( B ) The alleles are found on the X and Y chromosome

The alleles responsible for reproductive inheritance from parents to offspring is contained in the X and Y chromosome of the reproductive gametes.

The female gametes contains double X chromosomes while the male reproductive gametes contains one X and one Y chromosomes. The alleles that are responsible for inheritance ( i.e. the sex of the offspring ) are contained in this chromosomes.

Hence we can conclude that The true statement when describing sex-linked inheritance is the alleles are found on the X and Y chromosome.

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Answer:

Explanation:

1. Climate change is caused by changes in the earth's atmosphere in the amounts of greenhouse gases released into the air. Some scientists believe that 100% of global warming is due to humans. The largest contribution comes from burning fossil fuels because it releases carbon dioxide gas to the air, which is done by humans. Other factors that contribute to climate change include:

>Deforestation- clearing out trees affects wildlife, ecosystems, whether patterns. Forests cover 30% of the lands mass and clearing them leaves many animals without homes.

>Waste from factories- they release tonnes of toxic fumes into the air.

> Agriculture and farming- this is a surprising contributing factor to global warming. Animals produce a greenhouse gas called methane and when livestock are grazed at a large scale, the amount of methane produced is a big contributor to global warming.

     Some fertilizers release nitrous oxide, which is another greenhouse gas.

2. The effects of global warming include:

    >Melting glaciers- this leaves many animals without homes and it also causes a rise in sea levels which causes flooding. (that's 3 effects)

    >Worsening droughts- this leaves many humans to die as they have no food or water.

    >Increasing tornadoes

okay that's all i could do... hope it helps.

Answer:

 glycolysis; dihydroxyacetone phosphate

When fats are used as an energy source, the glycerol portion enters the glycolysis when it has been converted to dihydroxyacetone phosphate. Thus, the correct option is A.

Glycolysis may be defined as the process in which glucose (sugar) is partially broken down by cells in enzyme reactions that do not need oxygen.

In order to obtain energy from fats, triglycerides must be broken down into fatty acids and glycerol through hydrolysis. The fatty acids enter to Krebs cycle and are converted into acetyl CoA.

While the glycerol portion enters into glycolysis and is converted into dihydroxyacetone phosphate.

Therefore, the correct option for this question is A.

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Answer:

so that bread will rise when heating

Explanation:

the yeast will activate and be ready to produce gases when baking

Answer:

experiment

Explanation:

When you are controlling the conditions it is called an experiment.

An experiment is a special type of scientific investigation that is performed under controlled conditions typically including a dependent and independent variable.

A scientific investigation is a strategy for posing questions as well as testing potential responses.

Anecdotes are usually the starting point for a scientific investigation. Observations frequently generate questions.

Based on scientific knowledge, a hypothesis is a possible logical answer to a scientific question.

The goals of scientific research are to generate knowledge and provide explanations.

Science investigations are carried out in a variety of settings and by a wide range of individuals. Scientific investigations are carried out in a variety of ways that focus primarily on the collection of various types of evidence.

Thus, an experiment is a sort of scientific investigation which takes place under lab settings and generally involves a dependent as well as independent variable.

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Answer:

d

Explanation:

Answer:

The aspects of that natural resources like air, water, soil etc aspects include the existence,these aspects of population health and environment.

Explanation:

Population environment and the health is to the approach human development to conservation, health, population is the deep relationship that not only related to each other.

population environment or health is the process can perform effect of population growth in health and environment aspects, other hand population controlled balanced a environment, produce healthy people.

Biological aspect :- health and population are related with the biological aspects of that environment, health, and population aspects of environment related to each other.

Social aspects:- social and cultural aspects like to the festivals, tradition living standards  aspects environment, population and health are related each other.

Physical aspect:- the development construction bridge,canals, industries that are physical environment, these aspect interrelated health and population.

Economic aspect :- economic aspect is reflected by the health of the people,resources like water, plants, land.  

Explanation:

it is where we live and share resources with order species

I hope this was helpful

Answer:

Most food modifications have primarily focused on cash crops in high demand by farmers such as soybean, corn, canola, and cotton. Genetically modified crops have been engineered for resistance to pathogens and herbicides and for better nutrient profiles.

Explanation:

Answer:

electron, carbon, protein, mitochondria, neurons, mass of neuron, nervous system, brain, man

Answer:

b

Explanation:

A pedigree is a genetic representation of a family tree that diagrams the inheritance of a trait or disease though several generations

Answer:

B

Explanation:

Answer:

12% I think this is right answer v

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Answer:

the answer is 10%

Explanation:

the 10% rule states that only 10% of energy is passed from one trophic level to the other (organism to organism)

Answer:

kills all microbes that cause disease or spoilage.

Explanation:

There are different methods of sterilization, such as ultraviolet radiation, autoclave mechanisms, etc.

The sterilization mechanisms eliminate the microorganisms completely, thus generating sterile surfaces.

These mechanisms are used with surgical instruments, the operating room environment.

The autoclave method is the most widely used today due to its economical price, its ease of use and its practicality.

Sterilization methods must be strictly controlled with pilot or test microbiological cultures to be able to corroborate that these mechanisms function correctly, since otherwise they could trigger strong pathologies due to cross contamination.