can someone help me right now

Answer:

b. False

Explanation:

Caenorhabditis elegans is a well-known species which is widely used in genetic experiments (i.e., it is a model organism). C. elegans is a soil nematode that eats bacteria, but its survival depends on the ability to distinguish toxic from non-toxic ones. C. elegans cannot feed Bacillus thuringiensis because this bacterium produces a toxin Bt protein that damages its gut, thereby producing the death of this nematode. Interestingly, it has been proposed that Bt toxin pathways might be exploited for the design of new generation nematicides.

➜ If waxy coating is made on the surface of leaf, loss of water in the form of water vapour does not take place. Even the gaseous exchange will not take place. So, photosynthesis will either be reduced or will not take place.

The plant will not remain healthy for long because:

[i] Exchange of gases will not take place.

[ii] Photosynthesis will either be reduced or will not take place due to lack of CO2.

[iii] Transpiration will not take place, so there will be no mechanism of cooling in hot weather.

Answer:

What variation exists between the species for traits like beak size and shape?

Explanation:

If the question is looking for biodiversity, the answer would include variation.

Answer:

i ) Gompertz equation :

[tex]\frac{dP(t)}{dt} = \alpha In ( \frac{K}{P(t)} )P(t)[/tex]

ii) The year that population reaches 7 billion is 2013

iii) The logistic growth was more accurate

Explanation:

i) write and solve the differential equation for Gompertz growth

Gompertz equation :

[tex]\frac{dP(t)}{dt} = \alpha In ( \frac{K}{P(t)} )P(t)[/tex]

∝ = growth rate

k ( carrying capacity ) = 16 * 10^9

P(t) = population at time t

ii) Determine what year the population reached 7 billion

The year that population reaches 7 billion is 2013

solution attached below

iii) Determine if logistic growth or Gompertz growth was more accurate  considering world population reached 7 billion on October 31,2011

The logistic growth was more accurate because the when Logistic growth model was used, the year in which the population reached 7 billion was 2010 and this value is more closer to 7 billion on October 31 2011 ( given value )

Explanation:

Hope it will help you to solve your question.

Answer:

hiiiiiiiiiiiiiiiiiiii

Explanation:

understand

Answer:

The first answer, Because family members most closely represent the unique genomic (DNA) and environmental interactions that individuals experience. Is right

Explanation:

Answer: Reason Why

Explanation: A bigger target is easier to hit than a small one, and a big island is more likely to have species land on it by chance than a small one is. Larger islands have more space than smaller islands, so there are likely to be more resources available for species to use. The opposite is true for smaller islands.

Answer:

Probably not, as we might have evolved to become prey instead of predator

Answer:

i dont think so.

Explanation:

the dinosaurs would've already ate us, and crushed the cities. dinosaurs are too dangerous for us. especially the T-rex.

Answer:

Odometer

It is measured by an instrument called odometer.

Answer:

It is the process of production of milk by the mammary glands at the end of pregnancy. The milk produced initially by the glands is called colostrum. This milk is crucial for the baby as it provides the child with the initial immunity. This was a brief explanation of pregnancy, parturition, and lactation.

Explanation:

i hope this helps.... I found these

Answer:

prenatal growth process

Answer:i think its b

Answer:

B

Explanation:

Answer:

A) Dirt

Explanation:

Our environment comprises of two factors namely biotic factors and abiotic factors. Biotic factors are those in an ecosystem that consists of all living organisms such as plants, trees, humans, insects, animals, birds, etc. These living organisms will interact with each other and sustain their life.  

Abiotic factors are those that contain non-living organisms. These factors include soil, air, water, sunlight, etc. These factors often have a greater impact on biotic factors. From the question, a plant is a living thing and it belongs to the biotic factor.  

Answer:  They are all Abiotic factors actually but my best guess would be B. sunlight

Explanation:

Answer:

The promoter is the binding site for RNA polymerase, the enzyme that performs transcription.

Explanation:

The operator is a negative regulatory site bound by the lac repressor protein. The operator overlaps with the promoter, and when the lac repressor is bound, RNA polymerase cannot bind to the promoter and start transcription.

Hemophilia A and hemophilia B are inherited in an X-linked recessive pattern . The genes associated with these conditions are located on the X chromosome, which is one of the two sex chromosomes . In males (who have only one X chromosome), one altered copy of the gene in each cell is sufficient to cause the condition. Basically it's whatever you believe it is.

Answer:

CO2

Explanation:

CO2 is needed to produce glucose

Answer:

Structure of the simple squamous epithelium

The cells appear like scales that provide a smooth low-friction surface over which fluids can move quickly. Membrane carrier proteins are found in this layer that function to facilitate the movement of ions, gases, small molecules, or water through the cells.

Answer:

An entomologist is a person who studies, or is an expert in the branch of zoology. (A branch in zoology concerned with insects.)

Explanation:

Answer:

1. Lack of motion is death. Movement is a vital nutrient to your body, just as much as food, water, and oxygen.

2. Potassium supplements can prevent attacks of paralysis.

Explanation:

Answer:

Kingdom!

Explanation:

Answer:

Burning either fossil fuels or biomass releases carbon dioxide (CO2), a greenhouse gas. However, the plants that are the source of biomass for energy capture almost the same amount of CO2 through photosynthesis while growing as is released when biomass is burned, which can make biomass a carbon-neutral energy source.

Answer:

Either the X or Y chromosome (the sex chromosomes)

Explanation:

Color blindness, hemophilia and muscular dystrophy are three x-linked phenotypes.

Answer:

B. Dying hair a different color

Answer:

C

Explanation:

While D could be the right answer if it was phrased better the most liekly answer seems to be C as Genes are small segments of DNA and DNA makes up chromosomes in turn causing chromosomes to be made up of genes. I believe that proteins do make our traits so C is the best answer.

Genes are segments of DNA on chromosomes. The genes code for proteins that make our traits. So, the correct option is (C).

Genes are defined as the basic units of heredity passed from parent to child that are made up of sequences of DNA and arranged one after the other at specific locations on chromosomes in the nucleus of cells.

Genes are found in each one of the 37 trillion cells that make up the body. Every cell has a nucleus and inside each nucleus are chromosomes and all chromosomes are made of DNA, molecules that contain genetic information called genes.

A chromosome contains hundreds to thousands of genes where each normal human cell has 23 pairs of chromosomes, for a total of 46 chromosomes. Trait is any gene-determined characteristic and is often determined by more than one gene.

Thus, Genes are segments of DNA on chromosomes. The genes code for proteins that make our traits. So, the correct option is (C).

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Answer:

False

Explanation:

'Adenine' pairs with thymine and cytosine pairs with guanine in a DNA double helix.

It is false that in the DNA double helix, archaic pairs with thymine and cytosine pairs with guanine.

In molecular biology, the structure created by double-stranded molecules of nucleic acids like DNA is referred to as a "double helix."

A nucleic acid complex's double helical structure develops as a result of its secondary structure and plays a crucial role in establishing its tertiary structure.

One of the four bases—adenine (A), cytosine (C), guanine (G), or thymine—is joined to each sugar (T).

Adenine forms chemical bonds with thymine while cytosine forms chemical bonds with guanine to join the two strands together.

A broad head, prominent supraorbital ridges (brow ridges), and the absence of a prominent chin are characteristics of archaics that set them apart from anatomically modern humans.

Thus, the given statement is false.

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Answer:

A ribosome is made up of two basic pieces: a large and a small subunit. During translation, the two subunits come together around a mRNA molecule, forming a complete ribosome. The ribosome moves forward on the mRNA, codon by codon, as it is read and translated into a polypeptide (protein chain).

Explanation: