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pentagon [3]
3 years ago
12

What structure is only found in animal cells

Biology
1 answer:
Sholpan [36]3 years ago
4 0

Answer:

Centrosomes and Lysosomes

Explanation:

Animal cells each have a centrosome and lysosomes, whereas plant cells do not. Plant cells have a cell wall, chloroplasts, and other specialized plastids, and a large central vacuole, whereas animal cells do not.

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An Asian elephant has a weight of 52,900 newtons. This enormous weight is balanced on four feet. In a circus act, these elephant
Aleonysh [2.5K]

Answer:

Option B, 18.11 \frac{N}{cm^{2}}

Explanation:

Given-

The average surface area of one foot pad of an elephant is 2920 cm^{2}\\

Weight of an Asian elephant is 52900 newton

As we know, pressure is equal to total weight divided by total area of the surface on which it is concentrated.

Thus, pressure on one foot  pad of elephant is \frac{52900}{2920} \frac{N}{cm^{2}} \\

= 18.11\frac{N}{cm^{2}}

Hence, option B is correct answer

7 0
3 years ago
Is salt a solid or a liquid
tekilochka [14]
Salt is a solid by itself. With water, it forms a liquid. 
6 0
3 years ago
The fruit fly Drosophila melanogaster is an important model system for studying inheritance in animals and genetic control of an
Snezhnost [94]

Answer:

The correct answer is "strengths: inexpensive, easy to culture, short life cycle, large number of offspring; weaknesses: invertebrate model, some diseases such as immunological cannot be modelled, anatomical features are very different from humans"

Explanation:

The fruit fly <em>Drosophila melanogaster</em> is one of the most used animal model for genetic and biomedical studies. There are many advantages of using Drosophila as model, including that it is very inexpensive to handle, it is easy to culture, it has a short life cycle allowing to observe the changes in phenotype very quickly and its large number of offspring allows to include several repetitions per trait in a study. However, there are some weaknesses of using Drosophila to study human biology. First, obviously the fruit fly is very different from humans, it is an invertebrate and its anatomical features are very different, which makes impossible to model some disorders such as immunological diseases.

7 0
3 years ago
Marking brainliest
Oksi-84 [34.3K]

Answer:

nuclear

Explanation:

doesnt cause poulltion

6 0
2 years ago
Read 2 more answers
In humans, the maintenance of a stable internal temperature is a direct result of___________.
vampirchik [111]

The given question is incomplete. The complete question is:

In humans, the maintenance of a stable internal temperature is a direct result of___________.

a. detection of and reaction to stimuli in the  environment

b. digestion of starches and absorption of  protein from the internal environment

c. diffusion of water and excretion of glucose to  the external environment

d. transport of ATP and locomotion through  the environment

Answer:

a. detection of and reaction to stimuli in the  environment

Explanation:

Thermoreceptors present in skin layers of the human body sense the deviation of the body temperature from the normal range. As the body temperature rises above normal, the thermoreceptors send signals to the brain which n turn signals dermal blood vessels to dilate and sweat glands to secrete sweat. The heat from the body surface is lost to the surroundings to drop the body temperature towards the normal range.  

On the other hand, when the body temperature goes below the normal range, thermoreceptors send signals to the brain which in turn signals dermal blood vessels to constrict to conserve the body heat. If body temperature continues to drop, muscles are signaled to contract involuntarily to generate body heat to raise the body temperature towards the normal range.  

8 0
3 years ago
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