How many neutrons does element X have if its atomic number is 58 and its mass number is 163

Answers

Answer 1
Answer: Number of neutron = mass number - atomic number
                               = 163 - 58

Number of neutrons of element X is 105.

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Which mechanism do sponges possess that makes a predator think twice before attacking it?

Answers

Answer:

Sponges come under phylum Porifera. They exhibit cellular levels of body organization and are inactive in nature. The sponges are known to generate and discharge some kind of toxins. The discharging of the toxins may perform various activities like shielding themselves against the parasites and predators. However, these toxins are also considered to harm other sponges.  

This mechanism of sponges makes a predator think two times before attacking it. The sponge will generate toxins, which could disorder the metabolism of any species that try to eat them. However, the majority of the predators possess the tendency to detect the toxin via their sense of smell, and thus, helps them in avoiding the sponges.  

Sponges possess the defense mechanism of releasing toxins that make a predator

In the food chain below, which is the producer?
flower - mouse - snake- hawk

Answers

The question is asking us the following: "In the food chain below, which is the producer? And the food chain is: flower - mouse - snake- hawk", The producer is the organism that can produce energy from the source, typically from the sunlight, without eating parts of other animals. Producers are plants - and almost all plants are produces (some are also consumers). so the answer is "flower'

The producer is the flower.

Mr. Potter’s physical science classes conducted an experiment to determine the density of aluminum. Here are the density values each class period came up with: 1st hour = 3.1 g/ml, 2nd hour = 3.05 g/ml, 3rd hour = 1.9 g/ml, 4th hour = 2.35 g/ml, 5th hour = 4.2 g/ml, and 6th hour = 4.0 g/ml. If Aluminum’s true density is 2.7 g/ml, how would you group the class values based on accuracy?a.

Group: 1st, 3rd, 5th, and 6th hours, with one recorded decimal place in their values


Group: 2nd and 4th hours, with two recorded decimal places in their values


b.

Group: 3rd and 4th hours, with values under the true density


Group: 1st, 2nd, 5th, and 6th hours, with values over the true density


c.

Group: 3rd hour, with a 1 value


Group: 4th hour, with a 2 value


Group: 1st and 2nd hours, with 3 values


Group: 5th and 6th hours, with 4 values


d.

Group all classes as accurate

Answers

Answer;

B. Group: 3rd and 4th hours, with values under the true density. Group: 1st, 2nd, 5th, and 6th hours, with values over the true density.

Explanation;

Accuracy refers to the closeness of a measured value to a standard or known value.

Accuracy is a qualitative term referring to whether there is agreement between a measurement made on an object and its true (target or reference) value.

B. Group: 3rd and 4th hours, with values under the true density
Group: 1st, 2nd, 5th, and 6th hours, with values over the true density
(I just took this test)

What do aerobic respiration and anaerobic respiration have in common?1)Both begin with glycolysis.
2)Both occur in mitochondria.
3)Both require oxygen to proceed.
4)Both end with the electron transport chain.

Answers

A . Both begin with gylcolysis

The answer for this question is A

Cell membranes are often called a "fluid mosaic" of lipids and proteins. What is the role of the cell membrane structures? Structurally support the cell Store nutrients for the cell to consume Produce ATP to provide energy for the cell Selectively allow some materials into the cell

Answers

A .Structurally support the cell 
B.Store nutrients for the cell to consume 
C. Produce ATP to provide energy for the cell 
D. Selectively allow some materials into the cell

It would be A

The Cell membrane is like a wall it allows things to pass though regulated.


Hope that helps

3. Describe a root hair and explain its function

Answers

They are thread-like structures on the surfave of roots that absorb water and nutrients.