Which option(s) correctly describes chromosomes?
Chromosomes consist of tightly coiled DNA wrapped around proteins called histones
Each chromosome has one gene
Chromosome pairs contain completely different genes
Most human cells have two copies of each chromosome - one from each parent.

Answer:In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.

Chromosomes are not visible in the cell’s nucleus—not even under a microscope—when the cell is not dividing. However, the DNA that makes up chromosomes becomes more tightly packed during cell division and is then visible under a microscope. Most of what researchers know about chromosomes was learned by observing chromosomes during cell division.

Each chromosome has a constriction point called the centromere, which divides the chromosome into two sections, or “arms.” The short arm of the chromosome is labeled the “p arm.” The long arm of the chromosome is labeled the “q arm.” The location of the centromere on each chromosome gives the chromosome its characteristic shape, and can be used to help describe the location of specific genes.

What are the parts of a leaf (plant cell) involved in photosynthesis?

which of the following scenarios is least likely to have a detrimental impact on an ecosystem?

A. people fish every species at a slower rate than they can repopulate.

B. people regularly engage in trolling catching numerous species as by catch.

C. people fish sharks for sharks fin soup at a faster rate than they can repopulate.

D. people fish bluefin tuna to the point that they become endangered.​

cuales son las adaptaciones para el ecosistema acuatico

Which processes contribute to the formation of chemical sedimentary rocks?

Organisms decay in a solution.
Minerals dissolve and crystalize.
Rock fragments squeeze together.
The remains of plants and animals

true or false: the difference in the sun, earth, and moon’s syzygy is why there are different types of eclipses.

How does NADP*+ become NADPH?

When we inhale what do we bring in?

True or false: Despite the large explanatory ability of evolution, no direct observations of evolution have been made.

(vii) All the activities of a cell is controlled by?​

I'll mark brainliest, please, I need it!
The following diagram shows the branching tree for four kingdoms and some of their shared derived characteristics.

A slanting line is shown. There are four lines drawn vertically on this line at equal intervals. There is a black circle between each pair of these vertical lines. Protists, Plants, Fungi, Animals are written on top of each vertical line in order from left to right. Common Cell is written on the left most end of the sloping line. The second black circle has Mostly Multicellular written on it. The first black circle has X written on it.

What shared characteristic can be written at point X? Use complete sentences to explain your answer.

URGENT MY PROJECT IS DUE TOMORROW

IS CELL REPLICATION BASICALLY MITOSIS?

meaning of Natality Rate

describe 4 nations with high standard of living​

Describe how the Earth’s surface changed over time?

Two investors are each issued one bond with the same face value, maturity date, and yield. After both bonds have reached
maturity, it is discovered that one of the bondholders received a greater total return on her investment. If all expected payments
were received, which of the following could explain the difference in return? (1 point)

All of the components in the list below exist in either the mitochondria, the chloroplast or they can be found in either. Match up the components to the organelle in which they exist.

Which of the following is a biological hazard?
a) Noise
b) Fiber
c) Mold
d) Dust​

Life Processes
Which one of the following diets would you recommend to patient of high blood pressure?
(a) High sugar, low fat, low salt (b) Low sugar, low fat, low salt
(c) High sugar, high fat, low salt (d) High sugar, low fat, high salt

how do you use fossils to see change

George damaged a cranial nerve. His quality of life has decreased because he is no longer able to smile, move his mouth when he talks, or taste well. Which of the following nerves did George damage?

The type of fossil fuel made from the remains of ancient plants that lived millions of years ago is A. peat B. coal C. oil D. natural gas E. synfuel

Which structure is found in all eukaryotic cells?


flagella


large central vacuole


cilia


Golgi apparatus

1.
Choose which of Newton’s laws of motion is occurring in the boundary type’s situation.

Two plates that slide past each other build up stress that is released as an earthquake.
1st Law of Motion
2nd Law of Motion
3rd Law of Motion

How does the physical environment in a tide pool change between tides?

1. Which of the following can cause a short circuit? A.When a wire breaks B.When theh insulation around a wire is frayed C.When the battery runs out of electricity D.When there is no resistor in the circuit.​

Q2.A cook prepares a fresh fruit salad by cutting up a variety of fruits and placing them in a bowl
with layers of sugar in between. After two hours the fruit is surrounded by syrup
(concentrated sugar solution)
freshly-prepared fruit salad
Explain, as fully as you can, why syrup (concentrated sugar solution) was produced after
two hours.

The space that an organism in an ecosystem lives in is called a

A) community
B) population
C) habitat
D) niche

Why can populations of invasive species increase rapidly in new environments

In the GAL gene system, ________ are cis-acting regulatory elements, and the ________ protein is a trans-acting regulatory protein.

How can we make larger drawings ? Can someone tell me the guidelines please help