Contributing to cell membrane function, making bile acids essential for fat absorption, metabolizing fat-soluble vitamins, and making vitamin D are all functions of which nutrient?(A) Protein.(B) Carbohydrate.(C) Cholesterol.(D) Omega-3 fatty acids.

Answers

Answer 1

Answer:

Answer:

C. Cholesterol

Explanation:

Cholesterol maintains the fluidity of the cell membrane and thereby, regulates its function.

Bile acids are derived from cholesterol which serves as their precursor. For example, Taurocholic acid is a polar derivative of cholesterol. Bile acids serve in the absorption of fatty acids, glycerol, and fat-soluble vitamins as these compounds are non-polar in nature.

Vitamin D is produced when the derivative of cholesterol, 7-dehydrocholesterol undergoes photolysis in skin cells in presence of sunlight.

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A relationship between a producer and consumer is best illustrated by a?

Answers

A producer is usually a plant
A consumer is an eater like humans
So an example of a symbiotic relation ship could be an anemone which clown fish live in because it provides a home for the fish and clown fosh dont get stung by it protecting it and anemones get food from the fish

What prevents antibiotics from being effective against viruses?A. Viruses have a high rate of mutation.
B. Viruses have no RNA.
C. Viruses have no metabolism.
D. Viruses have a protein shell that protects them.

Answers

C) Viruses that have no metabolism prevents antibiotics from being effective against viruses.

The correct answer is C. Viruses have no metabolism

The movement of fluids between cellular compartments ________. the movement of fluids between cellular compartments ________. is regulated by osmotic and hydrostatic forces requires active transport requires atp for the transport to take place involves filtration

Answers

The movement of fluids between cellular compartments is regulated by osmotic and hydrostatic forces.

Hydrostatic pressure is the force exerted by a fluid against a wall which causes movement of fluid between compartments. This pressure is important for exchanging plasma and nutrients between capillaries and surrounding tissues and also in the nephrons (kidneys) where ensures proper filtering of the blood to form urine.Fluid also moves between compartments along an osmotic gradient (the difference in concentration of solutes on one side of the cell membrane to that on the other side). Water constantly moves into and out of fluid compartments via osmotic gradient.

Which one of these chordate groups lacks a post-anal tail and a notochord as adults?

Answers

The answer is tunicates.

Tunicates belong to phylum Chordata. Thus, it is expected to have dorsal nerve cords and notochords. But, as adults, they lack a post-anal tail and the notochord. The reason they belong to phylum Chordata is that their larval stages have all the characteristics of phylum Chordata - nerve cords, post-anal tails, and notochord. During metamorphosis to adults, tunicates lose these characteristics.

Place the events of fertilization and implantation in order. 1. Implantation of the developing embryo. 2. The developing embryo becomes a blastocyst which consists of a hollow ball of cells. 3. Mitosis occurs in the Fallopian tube. 4. The cortical reaction occurs, preventing polyspermy. 5. The egg is fertilized by the sperm.

Answers

Answer:

The correct order is

5, 4 , 3, 2, 1

Explanation:

The first stage is the fusion of sperm with egg in fallopian tube which induces chemical reactions that prevents fusion of multiple sperm with one egg. This is known as preventing polyspermy.

After this the fused egg starts dividing and growing through the process of mitosis. The growing zygote reaches the stage of morula after few cell division and continues the division process till it reaches the stage of blastocyst.

The blastocyst now move down the fallopian tube to attach to the wall of uterus. This stage is known as implantation.

Hence, the correct order is 5, 4 , 3, 2, 1

Messenger RNA carries a(n) ___________ of the DNA’s instructions out of the nucleus to the ___________.a. exact copy; ribosome
b. transcript; ribosome
c. exact copy; mitochondria
d. transcript; mitochondria

Answers

b. transcript; ribosome

Ribosomes are one of the most important organelles in the cell, mostly part of the rough endoplasmic reticulum. It manufactures enzymes such as proteins which will be utilized by many organelles in the cell. Microtubules are one, responsible for the framework and acts as a skeleton of the cell –cytoskeleton needs proteins, also cytoplasm and other organelles of the cell. For a prokaryote or a eukaryote cell to survive, they need protein.

Answer:

The answer is B

Explanation:

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Keystone SpeciesA keystone species is one whose presence contributes to the diversity of life and whoseextinction would lead to the extinction of other forms of life. A keystone species helps tosupport the ecosystem of which it is a part.An example of what can happen when a keystone species is removed occurred when furhunters eliminated sea otters from some Pacific Ocean kelp beds. Otters eat sea urchins,which eat kelp. With its major predator gone, sea urchin populations exploded andconsumed most of the kelp. Fish, snails, and other animals associated with the kelp bedsdisappeared.The grizzly bear is another example of a keystone species. Grizzlies transfer nutrientsfrom the ocean ecosystem to the forest ecosystem. The first stage of this transfer isperformed by salmon that swim up rivers, sometimes for hundreds of miles. Salmon are richin nitrogen, sulfur, carbon, and phosphorus. The bears capture the salmon and carry themonto dry land, scattering nutrient-rich feces (wastes) and partially eaten salmon carcasses.It has been estimated that the bears leave up to half of the salmon they harvest on theforest floor.One action humans can take that might ensure that these sea otters will continue their function asa keystone species in their environment is to(1) establish a sea otter wildlife refuge in the Atlantic Ocean(2) pass laws to regulate the hunting of sea otters(3) plant kelp in the Pacific Ocean(4) destroy sea urchins found living in the kelp beds