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Answer:

Uracil (U) is a nitrogenous base found only in RNA but DNA is deprived of it. In DNA Thymine is found.

Explanation:

Environmental science deals with biology along with geography and the environment. It addresses a recycling strategy and aids in leading an eco-friendly lifestyle.

A recycling strategy is a technique that includes the waste material into reusable material so that the pollution is reduced and the product is used efficiently.

The sciences aid in leading an eco-friendly life as they reduce the negative impact on the environment and make the world a better place.

Therefore, recycling and eco-friendly are the correct blanks.

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Answer:

The answer is D.

Explanation:

Farmers have to continuously use the pesticides once used the first time because they have become an indispensable part of an agricultural cycle.

#teamtrees #WAP (Water And Plant)

Answer:

The function of the pollen tube is to lead sperm cells into the ovary.

Explanation:

In angiosperms, the pollen tube is a structure formed when the pollen grain comes into contact with the stigma and germinates, producing a tubal extension that is related to the embryonic sac where the female gametophyte is found.

The function of the pollen tube is to conduct the male gametophyte —which is found in the pollen— to the embryonic sac, in order to come into contact with the oosphere and produce fertilization.

The other options are not correct because the pollen tube:

Answer: to lead sperm cells into the ovary .

Explanation: There needs to be a way for the sperm cells formed by the pollen's generative nucleus to reach the egg cells that are found in the ovary.

Answer: Only a single codon in the gene sequence is changed in base substitution mutation. Although a base substitution alters only a single codon in a gene, it can still have a significant impact on protein production.

Explanation:

Answer:

True

Explanation:

They are surrounded by a plasma membrane.

Answer:

what notes

Explanation:

Answer:

expect

Explanation:

Explanation:

Planarians are a group of Turbellaria, free-living flatworms that capture their food via a process of wrapping around it, entangling it in slime, and pinning it down before a prey into a gastrovascu lar cavity where free-living flatworms that capture extends from the mouth, bringing the prey into a gastrovascular cavity where free-living flatworms that capture extends from the mouth, bringing the digestion occurs.

D is the answer

^_^

^ Above is the right answer

Answer:

Meaning, example of Peer reviewed article

Explanation:

Peer review refers to procedure of scrutinizing a researcher's scholarly work, by other experts & specialists in the similar field.

This provides an important advantage of this is proper scientific, logical verification of the study.

Examples of some peer reviewed journals : Journal of child & adolescent Psychiatric Nursing

Answer:

the article does not say

Explanation:

edge 22

Answer:

b.cell from a sunflower leaf

The structure that can have chloroplast is the cell from sunflower leaf. The correct option is B.

Chloroplasts are chlorophyll-containing organelles found in plant cells; they are necessary for Earth life because photosynthesis occurs in chloroplasts.

Proplastids give rise to chloroplasts, as do chromoplasts, leucoplasts, as well as other plastids.

Chloroplasts are plant cell organelles that use photosynthetic energy to convert light energy into reasonably stable chemical energy.

They survive life on Earth by doing so. Chloroplasts also perform a variety of metabolic functions for plant cells, such as the generation of fatty acids and membrane lipids.

Chloroplasts are found in all green plants and algae. Chloroplasts can also be found in photosynthesis that don't appear green, such as giant kelp's brown blades or certain plants' red leaves.

Thus, the correct option is B.

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Answer : In radioactive decay, the half-life is the length of time after which there is a 50% chance that an atom will have undergone nuclear decay. It varies depending on the atom type and isotope, and is usually determined experimentally.

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Answer:d

Explanation:

I did the quiz

The solution with a pH value of 10 will have more OH- ions.  

In chemistry, pH is described as a scale that is specifically utilized to specify the basicity or acidity of an aqueous solution. The pH of different solutions are described as follows:

Thus, in this case, pH>7 and thus we can conclude that the solution will have more OH- ions than H+ ions.

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Answer:

When the ovum is fertilized by pollen tube core, it starts a process of differentiation which leads to the seed generation. In angiosperms, the fruit formation occurs from the ovary of flowers, simultaneously and in a similar way to the formation of seeds.

Explanation:

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correct answer is B; if the allele is expressed after reproduction has occurred.

The situation in which a gene pool contain an allele that causes a lethal disease is: (B) If the allele is expressed after reproduction has occurred.

When the allele is expressed after reproduction has occurred, individuals carrying the lethal allele can reproduce and pass on the allele before the disease is expressed. Since the disease may not manifest until later in life or after reproduction has occurred, the allele can persist in the gene pool without being selected against. Over generations, the allele frequency can remain relatively stable, leading to the presence of the lethal allele in the gene pool.

An allele can be defined as a variant form of gene. Alleles can exist in different forms due to changes in the DNA sequence. These changes can be substitutions, deletions, insertions, or other types of genetic mutations.

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Answer:

An increase in population, resources, natural disasters, and catastrophic events. Weather, natural disaster, human activity. As a population reaches its carrying capacity, resources become more scarce.

Answer:

Increasing  carbon dioxide  concentration  increases the  rate of  photosynthesis  as carbon  dioxide (CO2) is a limiting factor.

Explanation:

Some limiting factors like carbon dioxide, temperature etc. influence the photosynthetic rate, which may end up reducing the potential amount of carbohydrate produced by photosynthesis. Carbon dioxide is important for this form of biosynthesis: it provides the inorganic carbon that is integrated into carbohydrate molecules.

The photosynthetic rate can be slowed by a decline in the concentration of available carbon dioxide.

6 CO2 + 6 H2O + light  →  C6H12O6 + 6 O2

Carbon Dioxide + Water + Light       Glucose + Oxygen

Answer:

Explanation:

a

A researcher places part of a plant cell in a beaker of water. She observes that the plant leaves release bubbles of gas when she shines a light on the beaker, and this is due to the plants going through photosynthesis, which is in Option B.

The bubbles that are seen in water when plants are kept in light are actually oxygen bubbles. During photosynthesis, plants use sunlight, carbon dioxide, and water to produce glucose (sugar) and oxygen. The oxygen produced during photosynthesis is released into the surrounding environment as a waste product. When plants are submerged in water, this oxygen can accumulate and form bubbles. This process is called bubbling. The bubbles that are seen in the water are an indication that the plant is actively photosynthesizing and producing oxygen.

Hence, she observes that the plant leaves release bubbles of gas when she shines a light on the beaker, and this is due to the plants going through photosynthesis, which is in Option B.

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Answer:

Physical

Explanation:

Your not chemically chewing a cracker, you physically moving your jaw to chew the cracker

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Answer:

Speed of both will be decreases when they travel through the medium of water.

Explanation:

Both sunlight and radio wave has the same speed in vacuum but both speed will be decreases when they travel through the medium of water because the consistency of water is more than air which make hard to travel for sunlight and radio wave. The speed of sunlight is slightly decreases but the radio wave can't go too far in the water and finally stops so we can say that sunlight can travel through water but radio wave none.

Answer:

The landform marked with A is an ox-bow lake.

Explanation:

In the image, we can see a river and another fluvial landform right next to it. The river is meandering, moving through the plain in a zig-zag manner. The landform next to it has a half-circular shape, and it seems as it has been attached to the river until recently. In fact, the landform next to the river has been a part of the river until recently, but because of moving too far away from the base it became detached.

The landform in question is an ox-bow lake. This is a lake that has a short lifespan, and it usually has a half-circular shape, being just a few meters away from the river from which it formed. Initially, the ox-bow lake was actually part of the river and its meandering, but as the erosion was moving the water further and further away from the base of the river bed, the water was moving harder and harder, so naturally, the water moves in a direction where it is easier to do so. Little by little, the river starts to move in another direction, closer to its base, and the part of the meander that went too far away gets detached, thus forming an ox-bow lake.