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Strike441 [17]
3 years ago
9

30) Which of these is NOT a way that large molecules, like glucose, can enter a cell? A) diffusion through the cell membrane. B)

facilitated diffusion through protein channels in the cell membrane. C) endocytosis, when the cell engulfs the particles with pseudopods. D) active transport, when the cell pumps large molecules in through the membrane.
Biology
1 answer:
Katen [24]3 years ago
4 0

Answer:

the answer is B.

Explanation:

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To map genes of a bacterial strain, conjugation must be interrupted at given times. Suppose you have Hfr cells of genotype a+b+c
OLEGan [10]

Answer:

The answer is not in any of the options and is the following:

to eliminate any remaining Hfr cells.

Explanation:

In a medium that has a streptomycin antibiotic it is used to kill Hfr donor cells after the conjugation is interrupted. This is entirely due to the streptomycin sensitivity allele (str-s) which are found in Hfr strains. The presence of the streptomycin resistance allele, located in the receptor, is used for the specific destruction of Hfr donor cells after conjugation occurs.

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How does the contractile vacuole in a single-celled organism function to maintain homeostasis?
mezya [45]
The contractile vacuole expels excess fluid from the cell.
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3 years ago
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What happens to the average heart rate as a mammal holds their breath?
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Answer:

The heart beats slowly because oxygen consumption is reduced

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3 years ago
Comparing the forensic use of DNA fingerprinting and traditional fingerprinting produced by ink on a piece of paper, which fact
Marina CMI [18]

Answer:

The correct answer would be Both types of fingerprints can often be easy to obtain from the crime scene.

DNA fingerprinting is a technique used for a paternity test and in establishing a link between the biological evidence and suspect in the crime, identification of dead bodies et cetera.

It is based on the similarities and differences associated with the DNA sequence of organisms especially the non-coding or junk DNA.

The DNA fingerprints are developed in labs, they are not found at crime scenes.

At the crime scene, pieces of biological evidence such as blood, skin, hair et cetera are taken from which DNA could be extracted.

5 0
4 years ago
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There are several different kinds of aquatic ecosystems. Bogs get their water from precipitation, so they don't have many Fill i
Ratling [72]
  1. Bogs get their water from precipitation, so they don't have many <u>nutrients</u>.
  2. Marsh plants are adapted to waterlogged <u>soil</u>
  3. Swamps have <u>plants like trees and shrubs</u>.
  4. Rivers always have flowing currents and pick up <u>sediment</u> as they flow.
  5. Lakes are bodies of water on land.  
  6. Wetlands act as filters for nutrients and pollutants dissolved in the water.
  7. Estuaries are wetland regions where freshwater rivers mix with ocean water.

Explanation:

A wetland is a biome which has both water and land that are intermixed in various ways. According to the type of the wetland, the ecosystem differs.

Bogs: Wetland with water from precipitation and no inflow or outflow of surface or ground water.  

Soil: Acidic, infertile with less nutrient content

Vegetation: Acid-loving plants

Swamps: Forest wetlands near rivers and lakes.

Soil: well draining, mineral soil

Vegetation: Trees and bushes. Swamps are classified according to the vegetation, like coniferous swamp, hardwood swamp, shrub swamp etc

Marsh: Wetlands mostly inundated with water leading to waterlogged soil  

Soil: Organic and mineral soil

Vegetation: Hydrophytic plants adapted to waterlogged soil

Estuaries: Wetland regions enclosed by land one side where fresh water mixes with saline ocean water.  

Soil: Saline alkaline soil

Vegetation: Mangrove trees

Rivers and lakes are water bodies that form a part of wetlands.  

Rivers are flowing water bodies which flows through water current and picks up sediments as it flows.

Lakes are stationary water bodies that are enclosed by land mass on all its sides.

The wetlands act as a natural filter and receive all the sediments, pollutants etc which are dissolved in water and carried by the rivers and other water sources.

4 0
3 years ago
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