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3 years ago

Which of the following is an adaptation that helps to defend an organism against consumers?

Biology

2 answers:

AlexFokin [52]3 years ago

6 0

Answer:

The answer is A. A rose has thorns

Explanation:

sweet-ann [11.9K]3 years ago

5 0

Answer:

some plants have thorns some animals have spikes

Explanation:

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Why pig starter has the highest percent of protein <br>PLZ HELP ME ITS DUE TODAY

lisov135 [29]

Answer:

Explanation:

pig feeds only because it supplies amino acids necessary to the animal. But of the total amino acids in the diet, only the digestible amino acids are biologically available to the animal

6 0

3 years ago

Which of the following are among the most common second messengers?

frosja888 [35]

Answer:

The correct answer would be calcium ion and cAMP.

Secondary messengers refers to the intracellular signaling molecules which pass the signals from the receptors located on the surface of the cell to the target molecule present within the cell.

The secondary messengers can be classified into three major class:

Cyclic nucleotide for example cAMP (cyclic adenosine monophosphate), cGMP (cyclic guanosine monophosphate)
DAG (diacylglycerol) and IP₃ (inositol triphosphate)
Calcium ions (Ca⁺⁺)

Hence, from the given options, calcium ion and cAMP would make the correct choice.

3 0

3 years ago

In babies born prematurely, pulmonary surfactant may not be present in adequate amounts ______. in babies born prematurely, pulm

Gnoma [55]

Pulmonary surfactant is a mixture of lipids and proteins which is secreted into the alveolar space by epithelial type II cells. The main function of the surfactant is to lower the surface tension at the ir/liquid interface within the alveoli of the lung. In babies born prematurely, pulmonary surfactant may not be present in adequate amounts due to insufficient exocytosis in type II alveolar cells.

5 0

3 years ago

Explain how myopia and hyperopia are related to the lens focusing on the retina.

liq [111]

Answer:

In myopia the image is focused ahead of the retina. While in Hyperopia the image is focused beyond or behind the retina.

Explanation:

I'll start by defining the two key terms, Myopia and Hyperopia. Myopia is otherwise called short-sightedness. It is a condition where one cannot see the images of objects located far away from the eyes and tend to see images within a short distance from the eyes. Hyperopia on the otherhand is otherwise known as long-sightedness. It is an eye defect which manifests by one not seeing objects close to the eyes instead he or she see only objects far from the eyes. These two eye defects are a malfunction of the accomodation feature of the eye.

Normally when an object is viewed all the parts of the eye (the organ for vision) function to focus the image of that object on the retina but especially on a part of it called the *light spot*. This then translates the image to the brain using the optical nerve. The brain then interpretes what is being viewed

However in Myopia, images are focused ahead of the retina . This is as a result of the eyeball being too long in relation to the focusing power of the cornea and eye lens.

In Hyperopia on the other hand, images are focused behind the retina. This is by the diameter of the eye being too short or the cornea being too flat.

In conclusion, from the above stated points,it is glaring that Myopia and Hyperopia affect the lens's ability to focus images on the retina.

4 0

3 years ago

_____________________, commonly known as sea squirts, have a larval stage that resembles a chordate.

svetlana [45]

Urochordates, commonly known as sea squirts have a larval stage that resembles a chordate.

What are Urochordates? Give the characteristics of it.

Ascidians (sea squirts) are a common term for the Urochordata, also known as the Tunicata. The body of an adult tunicate is fairly simple. While possessing all the characteristics of a chordate, including a notochord, a dorsal nerve cord, pharyngeal slits, and the larva of many tunicates swims freely and lacks only these characteristics. Ascidia, Salpa, and Doliolum, for instance.

Characteristics features of Urochordata:

1. The grownups are anchored to the foundation.

2. It is also known as "Tunicate" because an adult's body is covered by a tunic formed of tunicin, a cellulose-like substance.

3. The notochord only appears in the larval stage and vanishes in the adult.

4. In adults, a dorsal ganglion takes the role of the nerve cord that is present in the larva.

5. The larva can migrate and changes into a different animal.

Learn more about Urochordata here:

brainly.com/question/1186221

#SPJ4

3 0

2 years ago