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mestny [16]
3 years ago
14

What is the movement of molecules across a barrier such as the semi-permeable cell membrane called

Biology
1 answer:
PolarNik [594]3 years ago
3 0

Answer:

DIFFUSION

Explanation:

Water, carbon dioxide, and oxygen are among the few simple molecules that can cross the cell membrane by diffusion (or a type of diffusion known as osmosis ). Diffusion is one principle method of movement of substances within cells, as well as the method for essential small molecules to cross the cell membrane.

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mosquitos have 6 chromosomes, dogs have 78, and a adder's tongue fern has 1262 chromosomes. Given this information, what can be
kherson [118]

Answer:

No information can be inferred

Explanation:

Chromosome number provides no reference for establishing any relationship between organisms. The number of chromosome cannot depict whether a living species belong to plant kingdom or animal kingdom. It cannot even depict the evolutionary history of any species. Thus, the organism with lesser chromosome has not necessarily evolved from the species having larger number of chromosome or vice versa.  

Chromosome number can only depict the quantity of genetic material with in an organism and hence no relationship can be established living species only on the basis of chromosome number.  

7 0
3 years ago
Match the following symbiotic relationships with the correct description:
k0ka [10]

The following symbiotic relationships with the correct description are shown below:

  • i. commensalism - c. symbiotic relationship in which one species is benefited, and the other is neither harmed nor benefited
  • ii. parasitism - b. relationship in which one species benefits while harming the other.
  • iv. symbiotic - d. symbiotic relationship in which both species benefit from the association.
<h3 /><h3>What is  a Symbiotic relationship?</h3>

This type depicts a close ecological relationship between the individuals of two or more different species.

There are different types of this relationship which can be seen in the descriptions given above.

Read more about Symbiotic relationship here brainly.com/question/20731481

6 0
3 years ago
How are the testes and ovaries similar? A. Both produce sex cells. B. Both connect internal reproductive organs to the exterior.
Bess [88]

Ans.

Testes and ovaries are male and female reproductive organs, respectively. These organs are similiar as testes produce male gametes or sperms by the process of spermatogenesis and ovaries produce female gametes or ova by the process of oogenesis.

These gametes fuse together to form zygote that develops into a multicellular organism. Thus, the correct answer is 'option A). both produce sex cells.'

3 0
4 years ago
Read 2 more answers
Billy is an 11-year-old boy who was admitted to hospital with dehydration. His parents said that over the last few months, he ha
mart [117]

Answer:

Billy  showed signs of type 1 diabetes.This is because,

1.His dehydration was from polyuria- excessive urination.

2. because of failure of his  pancreas to secrete insulin, for cellular utilization of glucose by beta cells-  he retains glucose in his  blood, and  lost  a lot of  glucose in his urine, thus water follow by osmosis, leading to polyuria causing dehydration.

His urge to replace lost glucose and fluids leads to great thirst polydipsia, another symptoms of type1. However, his  drop  in weight is  because, the solute concentration  of blood glucose is high due to lack  of  insulin.Therefore large amount is lost in the urine, with large volume of fluids leading to drop in  weight, and energy because cells lack glucose for biochemical reaction of energy production.

The dehydration leads to sunken eyes, loss of tissue turgor, and low fluid levels results in drop in blood pressure,-Hyportension.

Due to lack of glucose in the blood gluconeogensis sets in. Fats is converted to glucose by the liver  to supplement the lost glucose. The major by product of this reaction is a ketone-acetone. This explains the reason for the smell of acetone in his  breath.

2, The Test strip indicated large quantity of ketones. above ,3.0mmol/L .This is a confirmation of the Type 1 diabetes mellitus in Billy.As more fats molecules are broken down to glucose.

Explanation:

4 0
3 years ago
What is the energy molecule that is being used during photosynthesis?
pickupchik [31]
ATP i think! Have a good day, and good luck!
4 0
3 years ago
Read 2 more answers
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