3. For each of the following chemicals, list the subunit(s). Designate (with a star or asterisk) which

What type of membrane protein is involved in passing ions and polar molecules across membranes?

natima [27]

Answer:

The plasma membrane is selectively permeable; hydrophobic molecules and small polar molecules can diffuse through the lipid layer, but ions and large polar molecules cannot. Integral membrane proteins enable ions and large polar molecules to pass through the membrane by passive or active transport.

Explanation:

6 0

3 years ago

Escherichia coli living in the human large intestine is known to produce vitamin K and B-complex vitamins in exchange for a nutr

jolli1 [7]

Answer:

Symbiosis

Explanation:

Escherichia coli is a species of Gram-negative bacteria that lives in the large intestine of humans and animals that are healthy. There, it produces important vitamins that humans need for nutrition, such as vitamin K, B-complex vitamins, which makes it essential for the proper functioning of our organism and our health. In return, it receives the nutrients it needs for growth and division.

This species belongs to the group of essential microbiota of our organism that play an important role in our nutrition, metabolism, digestion, and even in our mood.

This means that E. coli lives in a symbiotic relationship with its host, the human. Therefore, if this species of bacteria is absent in our organism, due to antibiotic overuse for example, it could have important negative impacts in our health.

3 0

3 years ago

If you think of the earthworm body plan as a drinking straw within a pipe, where would you expect to find most of the tissues th

Otrada [13]

Option (A) lining the straw is correct.

<h3>What is the anatomy of Earthworm?</h3>

An earthworm is a terrestrial invertebrate and a member of the phylum Annelida.
They have a tube-within-a-tube body structure, corresponding external and internal segmentation, and typically include setae on each segment.
They can be found wherever the soil, water, and temperature permit.
The body of an earthworm is composed of a digestive tube and a thick cylindrical muscular tube that forms the body.
The body is divided into segments, and furrows on the surface of the body serve as markers for the segment boundaries.