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Answer:

1. Xanthium and Wild Oats.

2. The main purpose of check dams is to reduce water velocity and to trap sediments in gullies and streams instead of adding additional soil material being eroded away.

Explanation:

Answer:

1.a variable (often denoted by x ) whose variation does not depend on that of another.

2.a variable (often denoted by y ) whose value depends on that of another.

3.Control group, the standard to which comparisons are made in an experiment. ... A typical use of a control group is in an experiment in which the effect of a treatment is unknown and comparisons between the control group and the experimental group are used to measure the effect of the treatment

4.occurring continuously over a period of time.

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Answer:

Explanation:

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Answer: C. Mitochondria, ATP

Explanation:

The mitochondria is known as the powerhouse of the cell, and it produces ATP (energy).

The major functions and components of the following systems of the body

Muscles have been classified using different criteria, namely location, appearance and nature of regulation of their activities. Based on their location, three types of muscles are identified : (i) Skeletal (ii) Visceral and (iii) Cardiac.

The neural system is better organised in insects, where a brain is present along with a number of ganglia and neural tissues. The vertebrates have a moredeveloped neural system.

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Answer:

Enzymes regulate metabolic processes through a variety of feedback mechanisms including inhibition.

Explanation:

Eukaryotic metabolic regulation refers to the mechanisms by which metabolic anabolic and catabolic pathways are modulated in eukaryotic organisms. Anabolic enzymes are involved in the biosynthesis of molecules, while catabolic enzymes are involved in degradative pathways. Thus, enzymes regulate metabolic pathways by catalyzing chemical reactions at their corresponding rates of reaction. Moreover, feedback inhibition refers to those mechanisms occurring when one enzyme is inhibited by the end product of the metabolic pathway, enabling cells to regulate these products.

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Sinoatrial node myocytes' cAMP (3′,5′-cyclic adenosine monophosphate) signaling is necessary for cardiac pace making both at rest and during the sympathetic fight-or-flight response (SAMs).

The cAMP-sensitive effectors responsible for pace making in SAMs include the cardiac "funny current" (If). cyclic nucleotide-sensitive, hyperpolarization-activated (HCN) channels are responsible for its production. cAMP either binds to the HCN channels directly or activates the cAMP-dependent protein kinase (PKA), phosphorylating them, to enhance the voltage-dependent gating of the channels. The mechanism limiting cAMP signaling to a PKA-dependent route is unclear, however PKA activity is necessary for signaling between adrenergic receptors (ARs) and HCN channels in SAMs. In different kinds of cardiomyocytes, PDEs hydrolyze cAMP and create cAMP signaling domains.

Here, we look at the function of PDEs in the control of If in SAMs. When PDE and PKA inhibitors were present or not, as well as before and after AR stimulation, it was detected in whole-cell voltage-clamp assays from acutely isolated mouse SAMs. The midpoint activation voltage (V1/2) of If at rest was depolarized by general PDE inhibition, which also eliminated the need for PKA in AR-to-HCN signaling.

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Answer:

ATC CAG TAG GAC

R. TAG GTC ATC  CTG

Explanation: According to the laws of Chargaff

T is "the complement" of A

C is "the complement" of G

and vice versa

Adenine(A) is complementary to thymine (T), and cytosine (C) is complementary to guanine (G). The complementary base of the DNA strand ATC CAG TAG GAC is TAG GTC ATC CTG.

The Chargaff rule explains DNA base pairing. In DNA, the total number of purines is the same as the number of pyrimidines. A+G = C+T. Adenine (A) and guanine (G) are purines. Cytosine (C) and thymine (T) are pyrimidines. A purine makes a complementary base pair with a pyrimidine.

In normal conditions, adenine (A) makes a complementary bond with thymine (T), and guanine (G) makes a complementary bond with cytosine (C). Two hydrogen bonds are formed between adenine and thymine. Guanine and cytosine have three hydrogen bonds. Both strands of DNA are connected by hydrogen bonds among these nitrogenous bases. This gives stability to DNA, which remains in its double helical form.

Hence, the correct base pairing of ATC CAG TAG GAC is TAG GTC ATC CTG.

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Answer:

False

Explanation:

The layers include mantle, crust, cores, lithosphere.

Answer:

RNA_ single stranded, ribose sugar

DNA_ double stranded, deoxyribose sugar

Answer:

Atoms

Explanation:

Answer:

A. Atoms

Explanation:

Answer:

yes cell leaves contain more

Explanation:

this is the answer

Answer:

It depends on the battlefield.

Explanation:

sea going crocodile would win in the sea while jaguar would win on land.

Answer:

B)Silent mutation

Explanation:

A Silent Mutation is defined as a point mutation that does not change the amino acid. This occurs because more than one codon can code for the same amino acid. So while the protein was changed in the end there were no large-scale effects to the organism. This is why it is called a "silent" mutation because you cannot tell anything changes and there are no side effects.

Answer:The answer is carbohydrates and glycosylation

Even under high temperatures and low relative humidity conditions, storage life is typically  short time. Calyx freshness was evaluated on a scale from 0 to 2, zero when calyx shows good quality, one when quality remains  acceptable and two if it is no longer acceptable. Storage life is usually brief, even in high temperatures and low ratio conditions, therefore the one strawberry was decayed.

The best time to plant strawberries is within the spring, up to some weeks before the final frost date. You may extend your strawberry crop from late spring to early fall by choosing a variety spread of strawberry types. It takes roughly four weeks for June-bearing types from plant blossoming to fruit picking. Day-neutral and ever-bearing varieties both flower within the spring at roughly the same time and take roughly the same amount of time from flowering to harvest.

Counting on the variety chosen, one strawberry plant will provide 40 to 70 berries throughout the course of the season.  This is often equivalent to fruit weighing between 0.7 and 1.4 kilogram’s (1.5 to 3.0 lbs) in weight. They’re perennial, strawberry plants grow year after year. The lifespan of a strawberry plant is roughly six years, however after the primary two years, fruit production noticeably declines.

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Answer :Physical weathering happens especially in places places where there is little soil and few plants grow, such as in mountain regions and hot deserts.

Explanation:

The principal role of simple sugars (i.e. simple carbohydrates) in living organisms is to create cellular energy.

Simple carbohydrates (e.g. glucose, fructose) are a special class of macromolecules composed of only one monosaccharide unit, which serve as a source of energy for cellular respiration.

In conclusion, the principal role of simple sugars (i.e. simple carbohydrates) in living organisms is to create cellular energy.

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Answer:

It can provide if a number is greater than zero or less than zero

Explanation:

Answer:

The inference is that bacteria can be pathogenic or characteristic of the commensal microbiota of different organs.

Explanation:

The human coexists with commensal micro-flora or commensal biota that are in balance and protect it from other pathogenic microorganisms, that is why we constantly live with a group of bacteria that do not generate pathological conditions in our body and even promote the stimulation of the immune response. .

When this balance is broken, pathogenic or opportunistic microorganisms invade, this is how they proliferate and generate infectious diseases that threaten the balance or state of human health.

Answer:

10is a and 11 is b

Explanation:

The complementary nature of base pairing between the two strands of DNA is the structural property of DNA that gave Watson and Crick the idea that DNA replication was likely to proceed via a semiconservative mechanism.

DNA is a double-helix structure made from nucleotides. The nucleotides of the DNA are made from nitrogenous bases, sugar, and a phosphate group.

The nucleotide bases which is complementary to each other form a ladder by which the structure of the DNA is maintained. Adenine pairs with Thymine and Cytosine pairs with Guanine of the other strand.

Each strand of the DNA acts as a template to form in a semi-conservative replication model.

It was due to the complementary nature of the DNA that Watson and Crick proposed the semiconservative model for DNA replication. Each DNA strand acts as a template through which a new strand is made that is complementary to it.

Although a part of your question is missing, you might be referring to this question:

What structural property of DNA gave Watson and Crick the idea that DNA replication was likely to proceed via a semiconservative mechanism?

A) The nitrogen content in the bases

B) The complementary nature of base pairing between the two strands

C) The repeating nature of the sugar-phosphate backbone

D) The helical shape of the double strand

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Answer:

hey have demonstrated that applying a mask to an optical beam to give photons a spatial structure can reduce their speed.

Explanation:

Answer:

Scientists have long known that the speed of light can be slowed slightly as it travels through materials such as water or glass

Explanation:

Scientists have long known that the speed of light can be slowed slightly as it travels through materials such as water or glass. ... They have demonstrated that applying a mask to an optical beam to give photons a spatial structure can reduce their speed.

Answer:

hmmm General classification by food source results in the four main trophic levels. It is possible to have quaternary and higher “consumers”, as even secondary consumers may also use the first trophic level as primary consumers. Generally only about 10 percent of the energy at one level is available to the next level

Explanation:

1.65 picogram(s), that expected nuclear dna content of a primary spermatocyte in the same organism.

In a gamete (i.e. sperm or egg), the quantity of DNA is 1c, and the range of chromosomes is 1n. Upon fertilization, each the DNA content material and the range of chromosomes doubles to 2c and 2n, respectively.Because they're produced with the aid of using mitosis, number one spermatocytes, like spermatogonia, are diploid and feature forty six chromosomes.

Each number one spermatocytes is going thru the primary meiotic department, meiosis I, to provide  secondary spermatocytes, every with 23 chromosomes (haploid).A unmarried number one spermatocyte offers upward thrust to 4 sperms after meiosis. Primary spermatocyte undergoes first meiotic department to provide  secondary spermatocytes (haploid). The secondary spermatocytes produce 4 haploid spermatids after the second one meiotic department.

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Answer:

B. A bond between phosphate groups

Explanation:

In an ATP molecule, energy used by the cell is stored in a bond between phosphate groups.

Explanation:

Each gamete has an equal probability of containing either allele.

Answer:

D)4 haploid cells

Explanation: