Which space exploration activity has most helped astronomers determine the age of the solar system?

collection of lunar rock samples

experiments performed on the International Space Station

placement of mirrors on the lunar surface

collection of deep space images by the Hubble telescope

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:

I am assuming the question is asking how do the processes relate to one another.

Explanation:

Ventilation happens in the lungs, where carbon dioxide and oxygen are exchanged in the alveoli. This is done via cappilaries that surround the alveoli. Cappilaries are small blood vessels, which are collecitelvy part of the blood flow system (circulation) of the body. In reguards to the digestion, there are capillaries in the vili (which are tiny finger-like structures) so that they can pick up the nutrients during digestion. Another way blood flow and digestion are connected is because the stomach is a muscle, thus is moves and requires energy. That energy comes from the oxygen and nutrients that is supplied by the blood. These are just some examples.

Answer:

Paints, Lubricants, Biofuel, Face cream, Soap,

Explanation:

Fat is derived from plant and animal sources. They include seeds, fruits, fatty fish.

Fats serve as a source of energy in organisms and also serve as insulation.

If you think about fat as old stuff,what new stuff can be made from it means of the things fats can be made from and they include Paints, Lubricants, Biofuel, Face cream, Soap etc. These products are manufactured in industries on a large scale due to their high demand.

Answer:

Paints, Lubricants, Biofuel, Face cream, Soap,

Explanation:

Answer:

The options to this question are;

A. genotype

B. adaptation

C. selective pressure

D. stabilizing pressure

The answer is B) Adaptation

Explanation:

Adaptation is the process whereby an organism becomes well suited to survive in its natural environment, which is aided by the possession of certain traits called adaptive features. For example, the fins of a fish makes it fit to survive in an aquatic environment, likewise the opposable thumbs of humans make us well suited to survive in our environment.

As stated in the question, the opposable thumb i.e. movement of the thumb independently of the other four fingers, is a characteristics of primates. This unique feature (opposable thumb) allows us to grab things, get a good grasp of tools, use tools effectively, write things, etc. All these ability due to the possession of opposable thumb increases our chances of survival. Hence, the possession of opposable thumb is regarded as an ADAPTATION

Answer:

For efficient transportation of blood.

Explanation:

Answer:

Depends on the locations of these gene segment on the chromosome whether it be found on the same or different.

It can either be linked or unlinked.

Answer:

Hey there!

A warning safety sign is a sign that warns you that there may be a safety hazard around you.

Let me know if this helps :)

Answer:

Gas exchange is the delivery of oxygen from the lungs to the bloodstream, and the elimination of carbon dioxide from the bloodstream to the lungs. It occurs in the lungs between the alveoli and a network of tiny blood vessels called capillaries, which are located in the walls of the alveoli.

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Tysm!

Answer:

breathing allows the exchange between 2 gases: oxygen and carbon dioxide. Gas exchange occurs in millions of lung alveoli and the capillaries that surround them

Explanation:

Answer:

Compare two organism on the physical features and mode of nutrition.

Explanation:

Organisms are classified in groups and sub-groups on the basis of similarities and differences. so in order to compare two organisms, start with the similarities that are present between them. If similarities are more so they belong to the same group or if differences are more than both are placed in different groups. for classification, see the physical appearance of organism, mode of nutrition and habitat etc. If organisms are identical, they belong to the same species, if one or two characters are different so their genus will be same but specie is different. In zoo animals are different from the animals which is present in garden so compare the physical features of zoo and garden animals.

Answer:

D

Explanation:

all of those are likely to increase an organisms chances of extinction

Answer:

- Endoplastic reticulum

-cell membrane

-ribosomes

-mithocondrion

^ all the ansers

Explanation:

Cell membrane protects the cell and controls what enters and leaves the cell. So, the correct option is (C).

The cell membrane is also called the plasma membrane. It is composed of a semipermeable lipid bilayer that regulates the transport of materials into and out of the cell. It protects the cell and provides a stable environment within the cell, and this membrane serves many functions.

The main function of the cell membrane is to transport nutrients into the cell, while another is to remove toxins from the cell. Cellular membranes are composed of glycerophospholipids, which are molecules composed of glycerol, a phosphate group, and two fatty acid chains.

Thus, Cell membrane protects the cell and controls what enters and leaves the cell. So, the correct option is (C).

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Your question is incomplete, most probably complete question is:

_____Protects the cell and controls what enters and leaves the cell

A) cell wall

B) lysosomes

C)cell membrane

D)Vacuole

The figure shows a tree diagram with two main branches. The first branch leads to Drosophila. The second branch divides into two branches 3a and 3b. Branch 3a leads to Lancelet. Branch 3b divides into two branches: 4a and 4b. Branch 4a leads to Zebrafish. Branch 4b divides into two branches: 5a and 5b. Branch 5a leads to Frog. Branch 5b divides into two branches: 6a and 6b. Branch 6a leads to Chicken. Branch 6b divides into two branches leading to Human and Mouse, respectively.

This phylogenetic tree was constructed by comparing sequences for a homologous gene involved in development. Select the correct statement.

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.

A frog is the ancestor of both a mouse and a chicken.

The common ancestor of a human and a frog and the common ancestor of a mouse and a chicken lived at the same time.

Answer:

The answer is below

Explanation:

Given the information above, and from the available pictures which showed the detailed analysis of the information presented in the question. It can be concluded that, 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.

Hence, the right answer is option B.

Answer:

This distribution of species supports Gleason´s Individualistic concept of a community.

Explanation:

This theory was proposed by Gleason and it states that plant species respond individually to environmental factors that continuously change at spatial and temporal levels. This means that the combination and distribution of plants in a certain point or area are unique because each vegetable species has a different distribution pattern and a different tolerance and abundance rate. Hence each species´ response curve to a certain gradient has its own shape and size and it different from other species curves.  

Plants assembly growing in an area is the result of environmental conditions and migration rate of species. As every area is continuously getting propagules of different species, the survival success of each plant depends not only in environmental factors, but also depends on the tolerance to other new species and their interactions. This combination along a gradient always results in different composition and abundance of species. This is why a sample can not be confined to a clearly defined vegetable community.

This point of view is known as individualistic or continuum concept of vegetable community. Gleason believed that vegetable species were distributed as a continuum and that communities can not be identified as combinations of associated species that repeat in space.

Answer:

As John is testing the effect of temperature on the solubility of sugar in water. To test this, he will measure the amount of sugar dissolved at different temperature level.

Hello!!

The answer is A. Toxic nitrous oxides were releassed into the soil killing all plants

Answer:

Empty coal mines are flooded with acid rain so no life forms can survive.

Explanation:

Answer:

B

Explanation:

they are transmuting viruses

Answer:

attached or unattached ear lobes

Answer:

I'd say the best Answer is A & C

Explanation:

Answer:

two versions of a gene are carried in a single normal cell called alleles

Answer:

ok thus very good percent few Mohammad khan

Explanation:

it is necessary in mammals and birds to separate oxygenated and deoxygenated blood because this makes their circulatory system more efficient and helps in maintaining a constant body temperature

Answer:

Respiration is a type of metabolism.

Answer:

C. Respiration is a type of metabolism

Explanation:

Both B and D are incorrect because:

Multicelluar organisms have more than one cell; while singlecelled organisims only have one cell.

Also, homeostasis is a natural way an organisms body reacts to different situations, like when you sweat, your body is realising a way to lower the heat in your body. Therfore, A. is also incorrect.

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The role of Langerhans cells is that they prevent pathogens from entering the body using antibacterial agents.

Langerhans cell is a dendritic cell of the skin and mucosa, containing Birbeck granules, and present in all layers of the epidermis but most prominent in the stratum spinosum.

Langerhans cells play important roles in the immune system by acting as the outermost guard of the cutaneous immune system where they induce the first reactions against pathogens encountered via the skin.

Therefore, the role of Langerhans cells is that they prevent pathogens from entering the body using antibacterial agents.

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Answer: 3.identify pathogens that enter the body and carry them to lymph nodes for destruction

Explanation:

Answer:

Explanation:

                  The study of human DNA and genetics can be intellectually fascinating, but it also has plenty of practical applications. From the use of DNA in court cases to the discovery of new therapies for genetic diseases, a thorough understanding of the human genome can have important medical, social and legal impacts.

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.

Answer:

resists the turgor  pressure of the cell:  A : cell wall

controls the activities of  the cell : C : nucleus

site of the chemical  reactions of the cell  including synthesis of  proteins:  D : cytoplasm

Answer:

1. A -  Cell Wall

2. C - Nucleus

3. B. Mitochondria

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