plz answer my question plz tomorrow is my exam I need my answer plz​

Answer:

Carbon's valence is ±4.

Explanation:

Valency corresponds to the group;

Group 1 has valency +1

Group 2 has valency +2

Group 3 has valency +3

Group 4 has valency ±4

Group 5 has valency -3

Group 6 has valency -2

Group 7 has valency -1

Group 8 has valency 0

The valency refers to how many bonds an atom will make in forming a molecule/compound;

This is also referred to as the combining power of an atom.

Red blood cell antigens determine your blood group

Answer: The antigens expressed on the red blood cell determine an individual's blood group. The main two blood groups are called ABO (with blood types A, B, AB, and O) and Rh (with Rh D-positive or Rh D-negative blood types).

Answer:

newari , ? u nepali or which country ?

Explanation:

There are three really important types of guthi: death guthi, lineage deity guthi, and general worship guthi.

Si guthi related to death rituals

Dewali guthi related to worship of the clan deity

NASA guthi related to music

It's "Dialogue"

have a good day!

Answer:

A tsunami reduces the carrying capacity of the coastal environment.

It damages the ecosystem by reducing the available resources such as food or shelter, and consequently decreases the number of individuals.

Explanation:  

Due to technical problems, you will find the complete answer and explanation to this question, in the attached files.

Answer:

a

Explanation:

edg 2020

Answer:

a on edge

Explanation:

Answer:

c. Prophase, 456 minutes

Explanation:

According to this question, there are a total of 60 onion cells in different stages of mitosis. Of those 60, 19 are in prophase, 14 in metaphase, 12 in anaphase, and 15 in telophase. A full cell cycle lasts for 24 hours equivalent to 1440 minutes.

To calculate the amount of time spent in each stage of the mitotic process and discover which is the longest, we divide the number of cells in each state by the total number of cells and multiply by the total time in mins.

For prophase: 19/60 × 1440

= 456 minutes

For metaphase: 14/60 × 1440

= 336 minutes

For anaphase: 12/60 × 1440

= 288 minutes

For Telophase: 15/60 × 1440

= 360 minutes

Based on the calculation above, it can be realized that PROPHASE stage has the longest duration with a length of 456 minutes.

Using the ratio principle, the longest stage is Prophase with a duration of 456 minutes

The amount of time spent in each stage of Mitosis can be calculated thus :

Time spent per stage :

Anaphase :

Prophase :

Metaphase :

Telophase :

Therefore, the stage with the longest duration is the Prophase stage and the duration is 456 minutes

Learn more :https://brainly.com/question/19553250

Answer: Epoch

Explanation: An epoch is the smallest unit of time on the scale, but still encompasses a period of millions of years. Chronologically, epochs are grouped together into larger units called periods. Periods are combined to make a subdivision called an era. An eon is the largest division of geological time.

The smallest division of geologic time is an epoch. Thus, the correct option is D.

The geologic time scale is a representation of the time based on the rock record of the Earth. It is a system of chronological dating which uses the process of relating strata to time and the scientific branch of geology that aims to determine the age of rocks.

An epoch or reference epoch is an instant in time which is chosen as the origin of a particular calendar era. The epoch serves as a reference point from which the time is measured.

An epoch is a division of the geologic period and it is the smallest division of geologic time which lasts for over several million years.

Therefore, the correct option is D.

Learn more about Geologic time here:

https://brainly.com/question/22502144

#SPJ2

Answer:

Oxygen and glucose are both essential for energy production.

Explanation:

Glycolysis is the break down of sugar with or without the presence of oxygen to provide energy to our cells. The energy for the cell is in the form of ATP. In the presence of oxygen the process is much more efficient and is the last step in oxidative phosphorylation. In this process the Oxygen will pick up the protons that have driven the proton motif force that was used to turn the ATPase that was used to make ATP. The oxygen picks up these protons and keeps the cell pH stable and this is called metabolic water. The Dr should check the blood for the presence of both glucose and oxygen.

Answer:

carbon atomic number:6

carbon protons:6

electrons:6

group: 14

carbon valance eletrons:4

oxygen number:8

oxygen protons: 8

group: 16

valanece:6

Potassium: 19

protons: 19

eletrons:19

valance: 1

group:1

Arsenic: 33

protons:33

eletrons:33

valance: 5

group: 15

Iodine: 53

53

53

Valence: 7

group: 17

Calcium: 20

20

20

group:2

valence:2

boron: 5

5

5

group: 13

valance: 3

neon 10

10

10

group:18

valance: 8

Explanation:

Answer:

autotrophic

Explanation:

Plants also have a green colored pigment known as chlorophyll that is quite vital for photosynthesis. Hence, they have an autotrophic mode of nutrition. A plant kingdom is a massive group; hence, the kingdom is further categorized into subgroups.

Answer: A

Explanation: I believe its A cause it will cause the breakage of bonds.

Answer:

Migration distance is inversely proportional to the fragment size,

Explanation:

Gel electrophoresis is a technique used in molecular biology that uses electricity to separate biological molecules based on size (DNA) or charge (proteins). For the DNA molecule, different sizes are separated from one another based on how fast they can migrate through the gel matrix.

In this technique, small fragments or sizes of DNA migrates farther than long sizes of DNA due to low friction in the matrix. In other words, the smaller the size of the DNA fragment, the farther the migration distance and vice versa. This shows that an INVERSE RELATIONSHIP exists between the migration distance and the fragment size in the electrophoresis procedure.

Answer:

light to electrical to light dude

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:

B: Dam

Dams are used to hold back water

Answer:

Magma in the Earth's mantle moves in convection currents. The hot core heats the material above it, causing it to rise toward the crust, where it cools. The heat comes from the intense pressure on the rock, combined with the energy released from natural radioactive decay of elements.

Explanation:

Answer:

It is given that a particle covers 10m in first 5s and 10m in next 3s. so using the equation of motion

Case I

s=ut+

2

1

at

2

10=5u+

2

1

a(5)

2

20=10u+25a

4=2u+5a..............(1)

Case 2

In next 3s the particle covers more 10m distance. So

20=8u+

2

1

a(8)

2

5=2u+8a.........(2)

On solving equation (1) and (2)

4=2u+5a

5=2u+8a

a=

3

1

m/s

2

Put the value of a in equation (1)

u=

6

7

m/s

Now to find distance in next 10 s. total time will be 10s

s=

6

7

×10+

2

1

×

3

1

×(10)

2

s=28.33m

Distance travelled in next 2 sec

s=28.33−20=8.33m

Answer:

Yes, this is true.

Explanation:

Answer: True.

Explanation:

Answer:

Sampling

Explanation:

In research terms a sample is a group of people, objects, or items that are taken from a larger population for measurement. The sample should be representative of the population to ensure that we can generalize the findings from the research sample to the population as a whole.

Answer:

The mass of the cart is 26.7 kg.

Explanation:

To find this answer use the formula for acceleration first to find how fast the object had to be acccelerating to gain a velocity of 45m/s in 8 seconds flat.

Here's the formula for acceleration:

a = V- V₀ ÷ T (Wher V = final velocity; V₀ = Initial velocity, and T = time)

Plug all known values into the equation and you get -

a = (45m/s - 0m/s) ÷ 8 , which works out to 5.625 m/s²

Once you have this value then you place it into the equation for finding an object's mass, and that formula is:

M = [tex]\frac{F}{a}[/tex]  or M = [tex]\frac{150N}{5.625m/s^{2} }[/tex]

This works out to  26.6667 kg or approx. 26.7 kg if you are asked to round it to three significant figures.

Answer:

The answer is a.) Transform Boundary.

Answer:

D

Explanation:

Answer:

D. one or more cells

Explanation:

hope this helped!!

plz give brainliest ;-;

Answer:

Schuziopherania is a mental disorder that is a neural dysfunction of one of the projection pathways more specifically the Mesolimbic pathway which is helpful for the reward center as it transmits dopamine associated with pleasure and reward cognition.

In this disorder, the receptors present between the other parts of the brain and the region called limbic has an abnormal distribution. These receptors are known as D2 and in excess distribution lead to overstimulation which causes hallucinations and other overthinking and symptoms.

Affects:-

Result in MDD or major depressive disorder

Due to not understand social norms and language end in isolation

Irritation and stress because of the inability to express him/herself

social discomfort can lead to an embarrassing situation and lead to unemployment

Answer:

Hypothesis

Explanation:

Answer:

In general, energy flows from the Sun to producers and then to consumers. The path is linear as the energy present in one step is transferred to the next. You can find specific examples of this pathway in an ecosystem. ... Energy may be lost in living systems as it flows through them

Explanation:

Answer:

Explanation:

because there are people who love us, and people we love back. and we want to find out things, and learn, and become able to do things that we would like to do. we live bcz our family want us to live our life  and we want them to live along with us. and to make them feel happy   We live because we have hope, that tomorrow will be better  and want to see what happens next in future

Answer:

Moving against the concentration gradient, or in simpler terms, moving from a low-concentration area to a high-concentration area.

Explanation:

This action uses energy, as according to entropy, the substance will move from a higher concentration to a lower concentration, and cells have to put extra energy to pump the molecules / substance up the concentration gradient.

It is mostly used to trigger chemical responses in cells, like in neuron synapses.

Hope this helped!

Answer:

The speed of the river decreases

Explanation:

As the river slows down, all the sediments mixed up in there have time to settle on the floor.

Hope that helped! :)