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oksano4ka [1.4K]
3 years ago
8

1. Over time, the fish and crab populations have:

Biology
2 answers:
saveliy_v [14]3 years ago
8 0
D. It fluctuates up and down because there also lots of other fish that are giving birth and having babies and having more and more and then there are people that are also catching them and eating them or selling them
Marta_Voda [28]3 years ago
5 0

1-D

2-A

this is due to pollution

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Distinguish between chromosomes, genes and DNA
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Explanation:

DNA is the physical molecule that makes up both chromosomes and genes. DNA is typically found as one of the major parts of chromosomes. Chromosomes are larger, sometimes microscopically visible, structures in cells made of DNA and a few proteins. Genes are much smaller sections of the chromosomes, made of DNA, that specifically code for how to make proteins or RNA needed by the cell.

Physically it’s sort of like, DNA is the cloth, a chromosome is the shirt, genes are the collar, the pockets, the sleeve cuffs, the tail, etc.

A better functional analogy is a culinary travelogue. (travel book with recipes)

The dishes produced by the recipes in the book would represent the proteins made by the DNA/chromosomes/genes, like brown hair or eyes, or five fingers, or feathers, or melanin, or digestive enzymes, or muscles, etc.

The genes would be represented by the recipes in the book. Each contains the information to make some dish. Some recipes might even allow a chef to be able to make different variations of that dish as it appears some genes can do.

A chromosome is well represented by the whole book. Like the chromosome, the book contains all the physical material to allow the book to function, ink and paper, cover, binding, glue, stitching, etc. The chromosome, and actual cookbook, are where everything is put together and organized in some pattern so the cell - in the case of a chromosome - or a chef - in the case of a cookbook - can actually use it. Both can be “opened” and used or put away and unused, or even moved around from one place to another.

The best match for the DNA would be the ink actually organized into the images on the pages of the book. Some of it would form an actual recipe. Just like some DNA makes up genes. However, much of the ink might have nothing to do with the recipe. It might just be stories from the author’s past or interesting sidebars, just as much of the DNA in many chromosomes has nothing to do with making the protein product but may be interesting and have information from the past or other ancillary trivia. In fact a travel book with recipes may have a 1,000 pages but only 30 - 50 of the pages actually contain recipes, very much like some DNA/chromosomes/genes.

3 0
3 years ago
Explain in detail about Phospholipid Bilayer.
erica [24]

A phospholipid bilayer or lipid bilayer is a double layer of lipids in a cell membrane which has a hydrophobic and a hydrophilic part.

Hydrophobic - expelled by water

Hydrophilic - attracted to water

The layers form the cell membrane which means that it's functions are the same as the functions of a cell membrane, and are critic to the cells functioning.



Hope it helped,



BioTeacher101

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After deciding what the variables of an experiment are, a scientist should write out a __________, which is a step-by-step list
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A. procedure …………………………………………
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Which of the types of cells in T. adhaerens contain cilia (choose that all apply)
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cilia are lil eyelash kind of bit on cells. fiber cells have them.

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