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3 years ago

11

Natural _______is a mechanism for the evolution of a population to become better adapted for survival in a specific environment

.

1 answer:

Agata [3.3K]3 years ago

7 0

Answer:

natural selection

Explanation:

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The rhynchocoel is a ________.

Anastasy [175]

Answer:

fluid-filled cavity

Explanation:

Rhynchocoel is a fluid-filled tubular cavity present in the organisms of the phylum Nemertea. This cavity lies above the intestines of these organisms in the lower body.

Nemertea is a phylum composed of worms that can be found in shallow water.

These worms have already been classified as a branch of the Flatworms (such as Planarians), with which they are often confused. But recent embryological and molecular evidence points to a phylogenetic relationship with mollusks and annelids. They remind the Flatworms to be non-segmented flat worms. But unlike these, they have a complete bowel with mouth and anus, and a closed vascular system. The article on Planarians can be accessed here.

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3 years ago

Which vessels allows for oxygen movement into the tissues

krok68 [10]

Capillaries<span> are </span>small<span>, thin </span>blood vessels<span> that connect the </span>arteries<span> and the veins. Their thin walls allow oxygen, nutrients, carbon dioxide and waste products to pass to and from the tissue cells.</span>

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3 years ago

Read 2 more answers

What does facilitated diffusion across a cell membrane require

professor190 [17]

Answer:

Explanation: In facilitated diffusion, molecules diffuse across the plasma membrane with assistance from membrane proteins, such as channels and carriers. A concentration gradient exists for these molecules, so they have the potential to diffuse into or out of, the cell by moving down it.

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3 years ago

Why dose limestone often form cliffs in dry climates, but rarly forms on wet cliffs

iren2701 [21]

Because in wet climates the limestones break due to the rain, and dry climates do nothing to the limestone.

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3 years ago

In vertebrates, hormone production by the endocrine system is often controlled, either directly or indirectly, by the nervous sy

den301095 [7]

Answer:

If the question was actually pointing these (thyrotropin-releasing hormone TRH gonadotropin-releasing hormone GnRH antidiuretic hormone ADH thyroid-stimulating hormone (thyrotropin) TSH prolactin PRL follicle-stimulating hormone FSH luteinizing hormone LH) as the phrases, then the answer will be

•Thyrotropin-releasing hormone TRH describes ANTERIOR PITUITARY

•Gonadotropin-releasing hormone GnRH describes the HYPOTHALAMUS

•Antidiuretic hormone ADH describes the POSTERIOR PITUITARY

•Thyroid-stimulating hormone (thyrotropin) TSH describes the ANTERIOR PITUITARY

•Prolactin PRL describes the ANTERIOR PITUITARY

•Follicle-stimulating hormone FSH describes the ANTERIOR PITUITARY

•Luteinizing hormone LH describes the ANTERIOR PITUITARY

Explanation:

but if the phrases were to be this

1. Releases oxytocin

2. Synthesizes and releases PRL

3. Synthesizes and releases TSH

4. Synthesizes some hormones that are released into blood vessels bound for another gland

5. Regulated by hormones released into portal blood vessels

6. Is an extension of the Hypothalmus

7. Synthesizes oxytocin and ADH

8. Integrates nervous and endocrine systems

(...as found from another source),

the answers will be

1. Posterior Pituitary

2. Anterior Pituitary

3. Anterior Pituitary

4. Posterior Pituitary

5. Posterior Pituitary

6. Posterior pituitary

7. Posterior pituitary

8. Hypothalamus

....respectively.

3 0

2 years ago