Can you please help me

Answer:

the answer is A:aorta

Explanation:

I took the k12 quiz and got 100%

The two body systems being used to protect the structures beneath the dog's skin and signal the muscles to lift the paw are the integumentary and nervous systems, which are in option A.

The dog's response to the sharp stone involves the coordinated action of two body systems: the integumentary system and the nervous system. The integumentary system consists of the skin and its associated structures, including hair, nails, and glands. The skin acts as a protective barrier between the external environment and the underlying tissues, and it has specialized structures, such as tough, keratinized layers in the paw pads, that can withstand pressure and protect the sensitive tissues underneath.

Hence, the two body systems being used to protect the structures beneath the dog's skin and signal the muscles to lift the paw are the integumentary and nervous systems, which are in option A.

Learn more about the organ system here.

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Answer:

A mutation is a change that occurs in our DNA sequence, either due to mistakes when the DNA is copied or as the result of environmental factors such as UV light and cigarette smoke. Mutations can occur during DNA replication if errors are made and not corrected in time.

Explanation:

Answer:

nothingkekwowkwo

Explanation:

nothingsjejskskwko

Answer:

kinetochore

Explanation:

The kinetochore breaks down and the sister chromatids separate. The nucleus reforms and the cell divides. The kinetochore becomes attached to the mitotic spindle.

Answer:

The correct answer is - 25% chances of having puppies with spotty fur.

Explanation:

In this question, it is given that spotty fur is a recessive character which means in the heterozygous condition it is not expressed in the phenotype. Here the cross between two heterozygous dogs for spotty fur will produce the following gametes:

Heterozygous: S and s where S is dominant allele and s is the allele for spotty fur that is recessive

Punnett square:

      S       s

S   SS     Ss

s     Ss     ss

By the Punnett square, we can say that likelihood of spotty fur (ss) in puppies is only 1/4 or 25%.

Answer:

There is a certain temperature at which an enzyme's catalytic activity is at its greatest which is 37.5 oC

Enzymes are still proteins, and as with all proteins, temperatures above 104 degrees Fahrenheit, 40 degrees Celsius, will start to break them down.

Explanation:

The  temperature for most enzymes is about 98.6 degrees Fahrenheit (37 degrees Celsius).There are also enzymes that work well at lower and higher temperatures.

Hope this helped!!

Answer: D. All of the above

Dermal tissues also called epidermis, make up the outer layer of all plant organs (Roots, leaves e.t.c). They have three main tissue types which are ground tissue, vascular, and dermal, all plant organs contain these three tissues.

Answer:

um i think , that it's i move

Answer:

Step 1: A member of a board who wants to make a motion must first be recognized by the chair of the meeting. ...

Step 2: A member seconds the motion. ...

Step 3: The chair states the motion: “It is moved and seconded to ... ” At this point the motion now belongs to the group (not the maker or the “seconder”).

Explanation:

Step 1: A member of a board who wants to make a motion must first be recognized by the chair of the meeting. ...

Step 2: A member seconds the motion. ...

Step 3: The chair states the motion: “It is moved and seconded to ... ” At this point the motion now belongs to the group (not the maker or the “seconder”).

Answer:

A. Nervous

Explanation:

cmon man is this even a question??

Answer:

Changes from flooded to drained conditions in soils stimulate changes from aquatic to terrestrial vegetation and decrease the algal contribution to total primary production. Drainage of organic soils then has the effect of removing a source of net primary production (algae) and carbon sequestration

Explanation:

Use different words then I did

Answer:

Soil will become damp and will thrive in water

Explanation:

Divergent boundaries -- where new crust is generated as the plates pull away from each other.

Convergent boundaries -- where crust is destroyed as one plate dives under another.

Transform boundaries -- where crust is neither produced nor destroyed as the plates slide horizontally past each other.

Answer:

No

Explanation:

These traits are not genetic, thus the parents do not carry the sex-specific Alleles to pass off to offspring.

Answer:

This is not true because different genotypes can express the same phenotype, depending on the genes present.

Explanation:

Due to technical problems, you will find the complete explanation in the attached files.

Answer:

1. Increases

2. Decreases

3. Increases

4. Decreases

5. Increases

6. Increases

Explanation:

Raising air temperature increases temperature of our body while on the other hand, if the air temperature decreases the temperature of our body also decreases because high air temperature heats up our skin surface and low air temperature cools down our skin surface which ultimately increases or decreases the internal body temperature. Adding clothing increases body temperature due to capturing of heat produced by our body. Sweating cools down our body temperature because the water takes the internal heat with itself to the outside. In shivering, the body produced heat so the body temperature increases. Exercising also produces heat inside our body which increases the body temperature.

 The elasticity of those capillaries plays a central role in our ability to maintain constant body temperatures. When there's too much heat in the body, our capillaries automatically expand and increase the blood flow to the skin, allowing the excess heat to transfer to the air.

Answer:

B

Explanation:

Answer:

The correct answer is - Behavioral isolation.

Explanation:

In the question, it is given that the mosquitofish of different habitat shows different behavior as per the availability of predators in the particular habitat. For instance, some mosquitofish can swim continuously for a long time in fewer predators area whereas predator-rich ponds have mosquitofish that can swim in short, fast bursts.

It is evident that they diverged from common species that isolated in different regions, their behavior got changed according to the presence of predators. Thus, the isolation is here, behavioral isolation.

Answer:

Other answer is correct i didn't pay attention in this class

Explanation:

Answer:

Isotopes

Explanation:

If two atoms have different numbers of protons, they are different elements. However, if two atoms have the same number of protons, but different numbers of neutrons we refer to them as isotopes. Two terms we use to identify nuclides (isotopes) are atomic number and mass number.

Answer:

LETSS GOOOOOOOOOO

Explanation:

Answer:

Solution given:

Force [F]=500N

distance [d]=4m

time [t]=5s

Now

power =F× velocity

=F×d/t=500×4/5=400 watt

Answer:

Long tail and narrow head.

Explanation:

A sperm cell is adapted to reduce friction as it swims by having long head, narrow tail and enzymes. These features of sperm provides ability to swim straight to the egg cell. Long tail helps the sperm cell to swim towards the egg cell, narrow head of sperm cell make the sperm cell for faster swimming towards the egg cell and enzymes present in the head of the sperm helps break through the egg cell membrane so we can say that the long tail and narrow head of sperm cells helps in faster swimming.

Answer:

The bones of skeletal system serve to protect the body's organs and support the weight of the of the body ,giving the body it's shape

Explanation:

The muscles of the muscular system attach to these bones, pulling on them to allow for movement of the body

Answer:

B, C, F.

Explanation:

Hope this helps!!

Answer:

1. The greater the distance, the slower the orbital velocity

2.The amount of the gravitational force doubles

3.an ellipse that is almost circular

4.0.57

5.The asteroid spirals into the sun, The asteroid continues out of the solar system, The asteroid enters a stable elliptical orbit around the sun

6.The planets move in perfect circles, The Sun is at the center, The stars are fixed to an outer sphere

7.1/√5v

8.The distance to the sun varies

10.the time required to sweep out the areas

11.It explains why Mars appears to move backward for a few months approximately every two years, It shows the Sun at the center of the solar system

12.T^2=r^3

14.Gravitational force increases as the mass of objects increases, The theory applies to all objects in the universe, Gravitational force increases as the distance between objects decreases

Explanation: i just took the test and there 100% of you dont beleave me find out for your self its ok to disagree

Answer:

C. Lipids are insoluble in water. This allows lipids that make up biological membranes to regulate the entry and exit of many substances.

Explanation:

Answer:

The frequency of the recessive allele, t is f(t) = q = 0.29.

Explanation:

Due to technical problems, you will find the complete explanation in the attached files.

genetic diversity

Explanation: