2 Pretest: Unit 3
Question 1 of 32
The cell membrane controls what enters and leaves the cell. Which of the
structures in the diagram below is the cell membrane?

The cell membrane controls what enters and leaves the cell the structures below in the diagram depicetd as C below is the cell membrane and the function is to protect the cell from the outer harmful substances.

The cell membrane, also known as the plasma membrane, is a thin, semi-permeable layer that surrounds and encloses the contents of a cell. It separates the cell's internal environment from its external environment, and controls the movement of substances in and out of the cell. The cell membrane is composed of a double layer of phospholipid molecules, which have a hydrophilic (water-loving) head and a hydrophobic (water-fearing) tail. 

learn more about the cell membrane here.

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A mature plant cell is different from a mature animal cell because the plant cell has

mitochondria

a cell membrane

a large permanent vacuolel

a nucleus suspended in the cytoplasm​

What is the current to the following DNA strand TATTAGATTACA

Which of the following terms describe the Fungi?
-symbionts
-parasites
-predators
-saprobes

A city installs recycling centers that take wood products. How might the
recycling centers help increase the availability of wood?
O A. Recycling increases the cost of wood.
O B. Recycling increases the consumption of wood.
C. Recycling increases the supply of wood.
D. Recycling increases the demand for wood.

Durante el 2° período académico, los estudiantes de 7° de un colegio de Armenia estudiaron los diferentes tejidos vegetales e hicieron un experimento con una planta de fríjol. Para el experimento, regaron con agua únicamente las hojas superiores de la planta, impidiendo por completo la caída de agua a la tierra en la maceta. Al cabo de 1 mes arrancaron la planta de raíz para estudiar esta zona y se dieron cuenta de que, si bien la tierra estuvo completamente seca durante todo el mes, las raíces se habían mantenido bien hidratadas. ¿Qué tejido podría explicar los resultados observados por los estudiantes de 7°?

When considering ecosystem biodiversity, why would it be dangerous to treat each ecosystem as an isolated environment?
1. each ecosystem has a constant and consistent number of predators
2. rainfall is global occurrence that impacts every ecosystem on the planet
3. environmental conditions appearing in one ecosystem may appear in another
4. there are complex interactions that take place between ecosystems
​

What is likely to happen to a healthy population that is experiencing exponential growth ?

What is the main function of the endocrine system?

A. secrete hormones

B. send nerve impulses

C. produce blood cells

D. produce DNA

Describe a genetic disorder caused by a mutation in a single gene

What controls traits and inheritance?
gametes
nucleic acids
proteins
temperature

A Canyon landscape is of economic importance to an area. Explain
how this landscape can be utilized to secure economic sustainability
to the inhabitants.​

Describe how people get energy from oil nonrenewable

imagine a population of squirrels in which the squirrels are a range of sizes.
how can this type of diversity affect the population?

Needed substances are carried to the body cells by:
A)enzymes
B)blood
C)water
D)food

What nervous system is controlled by the hypothalamus?

A teacher is demonstrating that the boiling point of water does not change with water volume.
Which of these should the teacher perform to support this hypothesis?
A. Heat equal volumes of 10°C and 20°C water for 15 minutes each.
B. Heat equal volumes of water for 10 and 20 minutes and record any change in the volumes.
C. Heat 100 mL and 300 mL of water and record the temperature when boiling occurs.
D. Heat 150 g and 100 g of water until the containers are completely dry.

Four friends were talking about the food they ate. Here is what they were discussing. • Kaustubh: ' It gives us energy to walk, run and lift things." • Shailaja: "It becomes a part of our body." • Jayasree: "It helps to fight diseases." • Aarti: "It is needed for the functioning of organs like the heart, brain and lungs." Who is correct?

The huge U.S. Army base at Fort Bragg, North Carolina is home to a number of butterflies, plus other endangered animals and plants. Howitzers used during artillery training kill some of the butterflies, but fires started by the howitzer blasts also produce conditions in the base’s forests and wetlands that the butterflies need to survive. This is an example of which characteristic of military bases that makes them useful for conservation?

Choose three things that blood transports throughout the body.

Nerve impulses

French fries

DNA

nutrients

wastes such as CO2

oxygen

Why aren't human gonads up near our heart like they are in fish?

what is sustainable development?
what is environmental conservation?

Give short answer​

Compare how the human body breathes in and out. Describe what happens to the ribcage, the diaphragm and chest volume. use key scientific words. Well detailed please.
I’ll give brainliest

What is the purpose of the heart in the circulatory system?
Select one:

It provides oxygen during the release of hormones.

It is the muscle the pumps blood around the body.

It prevents pathogens from invading the organism.

It controls all of the body's functions.

Plant cell walls connect with other plant cell walls to create plants
A. organelles
B. mega cells
C. vacuoles
D. tissue

The number of small tree finches is increasing on an island inhabited by a large population of small ground finches. State one reason why the population of small ground finches has not been affected by the increasing number of small tree finches.

What are the products (comes out) of cellular respiration? (select all that apply)
A. Carbon dioxide

B. oxygen

C. Water

D. Glucose (sugar)

IS THIS CORRECT IF NOT WHATS THE ANSWER FAST PLS

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reproductive system brain pop Worksheet

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In what part of the plant are substances transported to where they are needed?
A. Roots

B. Stem

C. Leaves