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AVprozaik [17]
3 years ago
6

In the frog, how many times do the nostrils open and close in one minute

Biology
2 answers:
Yuri [45]3 years ago
8 0
A frog's nostrils can open and close 54 times in one minute.
strojnjashka [21]3 years ago
7 0
The Frog Nostrils should open about 54 Times.
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Which of these levels of organization includes all the other levels? ecosystem, community, individual organisms, population
katrin2010 [14]

Answer:

An ecosystem does!

Explanation:

An ecosystem holds the others! it includes everything to make a home for organisms

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3 years ago
What does selectively-permeable mean?
fgiga [73]
The cell controls what passes in and out of the cell
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You are looking at the side of a cliff with many horizontal rock layers. In the upper layers you find fossils of rodents, but in
valkas [14]

Answer:

millipedes were the first of these animal groups to evolve.

Explanation:

Fossils are structural remains of animals from the past. As these animals die, it takes years for the remains to be buried.

The millipedes are at the lower layer of the rock, next to insects, amphibians, and then rodents. This shows that millipedes existed and evolved before the rest of the found animal fossils.

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Which organelle is the powerhouse of the cell the site of cellular respiration
nikdorinn [45]
It is the Mitochondria
5 0
3 years ago
1.
Paladinen [302]

1. The right answer is cellular respiration.

Cellular respiration allows the production of ATP through the breakdown of glucose assisted by oxygen. We talk about aerobic metabolism. This metabolism is to oppose the fermentation which is done without oxygen (anaerobic) and that we detail in another file. Cellular respiration is divided into two phases, one cytoplasmic and the other mitochondrial.


2. The right answer is Chloroplasts transform light energy into chemical energy.

Chloroplasts convert solar energy into chemical energy, which are carbohydrates.

Chloroplasts (or plastids) are present in all plant cells (with the exception of some unicellular species that lack them). Located in the cytoplasm of the cell, containing chlorophyll and providing photosynthesis.


3. The right answer is It is constructed by connecting smaller monomer subunits.

Cellulose is a linear homopolymer composed of very numerous units of D-Anhydroglucopyranose (AGU) interconnected by β- (1 → 4) glycosidic linkages. The repetition pattern is the cellobiose dimer. The AGUs are in chair conformation and have 3 hydroxyl functions: 2 secondary alcohols (in position 2 and 3) and a primary alcohol (in position 6). These hydroxyl functions, as well as the glycoside bonds, are in equatorial position with respect to the plane of the cycle, which therefore causes the hydrogens of the ring to be in the axial position.

The degree of polymerization differs enormously depending on the origin of the cellulose; its value can vary from a few hundred to a few tens of thousands.


4. The right answer is Chloroplasts convert light energy into chemical energy that can be used by mitochondria.

Mitochondria and chloroplasts are organelles (organ-like cell elements) of the cytoplasm with a double membrane (inner membrane and outer membrane) and multiply as bacteria by division or budding.

Mitochondria are present in animal and plant cells, they allow the synthesis of proteins and are between 0.5 microns to 7 microns; chloroplasts are characteristic of plant cells, they capture sunlight and are the source of photosynthesis.


5. The right answer is homeostasis.

Homeostasis biological process that allows constants of the internal environment of the organism necessary for its proper functioning to be maintained (in limited values).

The whole regulation of homeostasis is through the autonomic nervous system (autonomic nervous system) and endocrine (hormonal) glands.


7. The right answer is chloroplast.

Chloroplasts are located in the cytoplasm of eukaryotic photosynthetic cells. In algae of the genus Chlamydomonas, there is a chloroplast per cell, usually bell-shaped and occupying a large part of the cytoplasm.

In the higher plants, most aerial parts contain them, and the leaves contain the most. Their favorite place is especially the mesophyll of the leaf where each cell can contain several tens of chloroplasts. Various aerial tissues do not contain much: epidermis-coating cells, aquiferous stomatal cells (groups of cells that evacuate water from certain leaves). In general, non-exposed tissue cells such as roots do not have them.


8. The right answer is It allows passage of particles into and out of the cell.

Membrane proteins are one of the three major classes of proteins besides fibrous proteins and globular proteins.

The functions of membrane proteins can be

*Signaling: Receptors coupled to G proteins

*Energy conversion: Photosynthetic reaction center ATP synthase

*Transport: Such as ABC Transporters, Potassium Channel, Aquaporins


10. The right answer is Only active transport requires ATP.

It is a transport of molecules against a concentration gradient that uses metabolic energy.

Permeases have a high specificity with respect to molecules.

There may also be saturation of the carrier.

The "ABC transporter" transport system is present in bacteria (ATP binding cassette transporters): it is a transporter with two hydrophobic trans-membrane domains associated on the cytoplasmic side with two nucleotide binding domains.

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3 years ago
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