One of the major functions of blood in animals is to maintain a(n) ______

Which characteristics do cell membranes and cell walls have in common?

bekas [8.4K]

A/Cell membranes and cell walls are selectively permeable and aid in communication.
Explanation: Cell Membranes or cell wall have phospholipid bi layer which functions as a selectively permeable barrier that separates an internal environment from an external one. They are selective permeable through passive process (concentration gradient) allowing certain molecule diffuse into cells

4 0

3 years ago

Which of the following structures surrounds the cytoplasm in a bacterial cell?

Taya2010 [7]

I'm pretty sure it's the cell membrane.

6 0

3 years ago

What does X represent in this model?

nadya68 [22]

X represent light energy
Remember the process by which plants make their food

3 0

2 years ago

Earthquakes also produce transverse waves that move more slowly than the p-waves. These

Andreas93 [3]

The frequency of the wave is 0.196 Hz

<h3>Speed of a wave</h3>

The speed of a wave is given by v = fλ where

f = frequency and
λ = wavelength

<h3>Frequency of the wave</h3>

Making f subject of the formula, we have

f = v/λ

Since

v = speed of wave = 4.5 km/s = 4.5 × 10³ m/s and
λ = wavelength = 2.3 × 10⁴ m.

Substituting the values pof the variables into the equation, we have

f = v/λ

f = 4.5 × 10³ m/s ÷ 2.3 × 10⁴ m.

f = 1.957 × 10⁻¹ Hz

f = 0.1957 Hz

f ≅ 0.196 Hz

So, the frequency of the wave is 0.196 Hz

Learn more about frequency of a wave here:

brainly.com/question/22027684

7 0

2 years ago

Two processes form a cycle when the output from one process is the input for the other process, and vice-versa. Explain why resp

mylen [45]

Explanation:

Photosynthesis produces glucose and O2 from inorganic CO2, light energy and water.

6CO2 + 6H20 + (energy) → C6H12O6 + 6O2

These end products, namely O2 and glucose are then used in respiration...

C6H12O6 (glucose) + 6 O2 → 6 CO2 + 6 H2O + ≈38 ATP

The CO2 and H2O produced as waste in respiration can then be incorporated at the beginning of photosynthesis. Thus the reactions are cyclic- they feed into each other.

Further Explanation:

Photosynthesis is a chemical pathway that’s integral to producing energy in plants and other primary producers. Energy in the form of molecules of glucose is produced from light, water and carbon dioxide while oxygen is released. This occurs in several complex steps, photosynthesis is a rate limited reaction, depends on several factors including carbon dioxide concentration, ambient temperature and light intensity; the energy is retrieved from photons, I.e. particles of light, and water is used as a reducing agent. This occurs in the thykaloids, where pigment molecules like chlorophyll reside.

Occuring in several complex steps, photosynthesis is a rate limited reaction, depends on several factors including carbon dioxide concentration, ambient temperature and light intensity; the energy is retrieved from photons, I.e. particles of light, and water is used as a reducing agent. Water supplies the chlorophyll in plant cell with replacement electrons for the ones removed from photosystem II.

Additionally,

water (H2O) split by light during photolysis into H+ and OH- acts as a source of oxygen along with functioning as a reducing agent; it reduces the molecule NADP to NADPH by providing H+ ions and produces molecules of the energy storage molecule ATP through an electron transport chain.
This occurs in the thykaloids, where pigment molecules like chlorophyll reside.
Later, in dark reactions, NADP and NADPH are used in the Calvin cycle where monosaccharides or sugars like glucose are produced after the modification of several molecules. These store energy in their bonds, which can be released in respiration in the mitochondria.

In all eukaryotic cells mitochondria are small cellular organelles bound by membranes, these make most of the chemical energy required for powering the biochemical reactions within the cell. This chemical energy is stored within the molecule ATP which is produced. Respiration in the mitochondria utilizes oxygen for the production of ATP in the Krebs’s cycle via the oxidization of pyruvate( through the process of glycoysis). The electron transport chain, in which oxygen functions as the terminal electron acceptor occurs in both plants and animals.

Glycolysis: occurs in the cytoplasm 2 molecules of ATP are used to cleave glucose into 2 pyruvates, 4 ATP and 2 electron carrying NADH molecules.
The Kreb's cycle: in the mitochondrial matrix- 6 molecules of CO2 are produced by combining oxygen and the carbon within pyruvate, 2 ATP oxygen molecules, 8 NADH and 2 FADH2.
The electron transport chain, ETC: in the inner mitochondrial membrane, 34 ATP, electrons combine with H+ split from 10 NADH, 4 FADH2, renewing the number of electron acceptors and 3 oxygen; this forms 6 H2O, 10 NAD+, 4 FAD.

One of the major functions of blood in animals is to maintain a(n) _______ internal environment.