BIOLOGY MIDDLE SCHOOL

All living things are made of one or more cells. Here are two types of cells: an animal cell and a plant cell. Sometimes when plants are under water stress, they wilt. Animals do not wilt! What analogy based on the plant cell structure explains wilting?

Answers

Answer 1
Answer:

Answer:

Presence of cell wall around the plant cells.

Explanation:

An adequately hydrated plant cell is firm due to presence of turgor pressure. Loss of water results in loss of turgor and the plant cells become limp and exhibit wilting. Irrespective of loss of turgor, presence of rigid cellulosic cell wall around the plant cells maintain their structural integrity.

On the other hand, animal cells do not have cell walls around them which in turn do now allow them to maintain the structure after loss of water.

Answer 2
Answer: Osmosis - the control of letting water pass through our cells


Related Questions

HIGH SCHOOL

Choose the molecule that is described by each phrase. energy used during long activities:

Answers

Answer:

This energy comes from fats, specifically lipids.

Explanation:

Lipids are fat molecules that, in the organism of living beings, perform a series of biological functions, mainly the long-term storage of energy.

One of its characteristics is that they are easily stored by the body, but they are difficult to consume. This explains why foods rich in lipids are usually the ones that contribute the most to those unwanted fats!

In fact, when ingested in excess, they are stored in adipose tissue. The organism normally only starts to consume these molecules when there is a deprivation of other energy sources.

Answer:

Lipids.

Explanation:

Lipids are for longterm energy. Commonly confused with carbohydrates but carbs are short term.

MIDDLE SCHOOL

Which steps are part of the process during the formation of molded fossils

Answers

Answer:

1.- Mineralization

1.1 Recrystallization

1.2 Epigenization

2.- Carbonization

3.- Casting and Molds

3.1 Exterior

3.2 Interior

3.3 Against mold

Explanation:

The fossils, somatofossil, icnofossil, are formed after the remains of the body is buried. There are three forms of preservation, mineralization, smelting and molding and carbonization that preserve the remains for millions of years.

1.- Mineralization

They are processes in which bones and ichnofossils are formed. The remains of the body receive an addition of minerals or an alteration of the original minerals existing in the bone, which end up turning the remains practically into rock, with which it is known by petrification. Good examples are tree trunks, large bones and shells.

Within the mineralization we highlight two modes of fossilization that you can see below.

1.1 Recrystallization

The original organism is not preserved in its original material, the bone, for example, which is mostly replaced by some other mineral and the structure or shape of the fossil is partially modified.

1.2 Epigenization

This process is divided into two types.

The first, permineralization, occurs when the original material of the organism undergoes an addition of minerals that penetrate the bone, for example, leaving this petrified and heavier, since in addition to the original material the weight of the minerals added by time.

The other process is known as pseudomorphosis, where the original form of the organism is maintained but its material is completely replaced by another mineral.

2.- Carbonization

It occurs when there is a loss of volatile substances (oxygen, hydrogen and nitrogen mainly), leaving a carbon film. It is more frequent in structures formed of lignin, chitin, cellulose or keratin. This occurs when remains of plants or animals are crushed under a rock.

3.- Casting and Molds

They are negative impressions (it does not represent the organism as it really is, just an inverted mold) or positive (it represents the organism as it really is, that is, a copy), of parts of the organisms or their icnofossils. The molds are formed in 3 types.

3.1 Exterior

Forms a negative impression of the organism, such as the skin of an animal or the surface of a shell. The organism is covered in its outer part by a type of material, such as mud, for example, and its body over time remains the format of the organism in the mud that turns into rock, however for this to occur it is necessary that the remains have some surface with indentations, holes, irregular texture and that is somewhat resistant, so that the material that will form the impression can penetrate there and solidify. See the outer mold of a shell below.

3.2 Interior

Forms an internal impression of the organism, commonly occurs in shells. The mold is negative and is formed when mud or any other material penetrates inside the holes and into the rest of the animal and it ends up curdling. The body decomposes and a mold is left of the inside of the shell or of the organism in question.

3.3 Against mold

It forms a COPY of the original organism, but it is more difficult to produce naturally, since for the counter mold to be made it is necessary that first an internal or external "first mold" of it be made. This mold is filled with some material and would form a copy of the organism that formed the "first mold."

Hello! mark me brainliest please

Sediment hardens into rock.  √
Sediment is eroded from rock.  
Organisms are buried under sediment.  √
Organisms' shapes are preserved in rock.  √
Organisms' soft tissues and bones are preserved.

Explanation:
A mold fossil is a type of fossil that is formed when an organism dies and is buried in sediment such as sand or clay, the sediment hardens to rock and the organism decomposes leaving an empty space or an imprint in the rock.
HIGH SCHOOL

For survival a hummingbird uses a considerable amount of energy . This energy most directly results from the life activity of ?

Answers

This energy most directly results from the life activity of  respiration.

The hummingbirds have very high energy expenditure (have the highest oxygen requirements of all vertebrae) with a fast heart rate, very fast wing beats and sustained hovering. So the hummingbird is nearly always on the edge of starvation, needing to take in more nectar than its body weight each day.

The respiratory system of these birds is highly adapted for the high oxygen needs. So, the muscles of the hummingbird cause pressure changes within the air sacs. As a result, more oxygen can enter the respiratory system. Also, they have the highest density of red blood cells which allows them to rise heart beat to around 500 breaths per minute during flight.


Answer: Cellular respiration

Explanation:

The process by which the living organism derive energy for the various metabolic processes of the body is known as cellular respiration.

This process allows the body to obtain energy from the food that they eat. Humming bird usually feeds on the nectar of flowers as a source of energy.

The cellular respiration is the process by which this food will be transformed into adenosine triphosphate which is a high energy molecule required for various processes of the body.

HIGH SCHOOL

It is crucial that the process of mitosis is error free. This is because otherwise healthy cells can

Answers

The right answer is Become cancer cells.

To multiply constantly, cancer cells bypass many regulations of cell proliferation, which leads them to proliferate uncontrollably. These cells have several solutions to prevent senescence.

In a healthy situation, a cell needs growth factors to proliferate. In a cancerous situation, the cancer cell can mutate an oncogene so that it permanently generates proliferation signals, regardless of the presence of growth factors.

For a cell to proliferate, the critical point it must pass through the cell cycle is the restriction point maintained by the Rb protein. Proliferation signals must be sustained to inactivate this control point as the rest of the cell cycle progresses without external stimulation. To proliferate excessively, the cancer cells thus overactivate the cell proliferation signals to pass the restriction point as quickly as possible. They use several strategies to over-activate these signals.

Because the cells, if damaged or not made right, could become cancerous cells so therefore the answer is C
HIGH SCHOOL

What molecule forms the cell membrane?

Answers

Answer:

The correct answer will be phospholipids.

Explanation:

Plasma membrane or cell membrane is a thin biological layer surrounding the cytoplasm of the cell separating the interior of the cell from external environment.

The plasma membrane is made up of phospholipids primarily in addition with associated proteins and cholesterol. A phospholipid is a molecule formed of two fatty acid tails, glycerol and a phosphate-linked head group.

It exists as bilayer formed of phospholipids with hydrophobic tails of fatty acids pointing inwards and hydrophilic head facing outwards forming a structure called lipid bilayer.

Thus, phopholipids is the correct answer.

MIDDLE SCHOOL

Fossils of snakes with hind limbs but no forelimbs have been discovered. Which of the following
conclusions is best supported by this fossil
evidence?
A Snakes are likely to evolve limbs in the future.
B Snakes are well adapted to live on land without
limbs.
C Snakes have evolved from an ancestral reptile
with limbs.
D Snakes are poor competitors compared to
reptiles with limbs.

Answers

C

The fossil was not of a snake but rather an ancestor of the snakes. The ancestor had short hind legs and gradually, over time, lost them to suit its needs in its particular environment.

Answer:b

Explanation:

COLLEGE

The two energy containing compounds created in the light-dependent reactions that are used in the light-independent reactions are ________ and _________. A)ADP and NADP B)NADPH and ATP C)water and glucose D)pyretic acid and ATP synthase

Answers

B is the correct answer

HIGH SCHOOL

How does life change in aquatic biomes as depth increases?

Answers

LIfe much change in that there is less light and higher pressure. Therefore the organisms must be able to survive with little vitamin D (since that comes from the sun) and also they must not need as much warmth or as much oxygen. Most have their own way to produce light (jelly fish) and they must have a flexible skeleton so that it does not get "smooshed"(crush) by the high pressure.
MIDDLE SCHOOL

Which of the following is a feature of all cells? O
A. All cells have a nucleus.
O
B. All cells have DNA for at least part of their life cycle.
HET
.
O
C. All cells are spheres.
O
D. All cells have a rigid cell wall.

Answers

The answer would be B. As all cells have DNA

: A. All cells have a nucleus. All cells contain a nucleus, which is the control center of the cell. The nucleus is responsible for controlling the activities of the cell, including the production of proteins and other molecules.

What is the function of a cell ?

It also stores the cell's genetic information in the form of DNA. The nucleus is surrounded by a membrane, which separates the nucleus from the rest of the cell. Without a nucleus, the cell would not be able to carry out its necessary functions. B. All cells have DNA for at least part of their life cycle.

All cells contain DNA, which is the genetic material that carries the instructions for how the cell will grow and develop. DNA can be found in the nucleus of the cell, as well as in the cytoplasm. DNA is present in all cells for at least part of their life cycle.

Also, It is responsible for passing on genetic information from one generation to the next and is essential for the growth and development of the organism. Therefore, A and B are features of all cells.

Learn more about  cells at:

brainly.com/question/30046049

#SPJ7

Random Questions