BIOLOGY HIGH SCHOOL

The traits of populations in the forest ecosystem have changed over time. What caused the traits to change?

Answers

Answer 1
Answer: natural selection is what caused them to change

Related Questions

Observation of tool-making among chimpanzees was revolutionary primarily because scientists believed _______. a. chimpanzees lacked the dexterity to make tools b. tool use was a defining characteristic of humans c. tool-making was a defining characteristic of humans d. none of the above
Which type of water is the least dense? A. warm, salty water B. warm water with no salt C. cold water with no salt D. cold, salty water
The cell divides only 1 time in___ and 2 times in___
A species of lizard is found on the eastern and western sides of part of a mountain range. On both sides, individual populations are small. On the western side, individual populations are relatively close together and males move extensively among populations to breed. On the eastern side, however, populations are farther apart and males seldom move among more than one or two adjacent populations to breed. If you were to study the genetic diversity of western and eastern populations, which pattern would you expect to find?
Which is a carbohydrate? polysaccharide nucleotide amino acid nucleic acid description?

Which of the following types of algae would have rigid cell walls composed of silica?a. paramecium
b. euglena
c. diatoms
d. spyrogyra

Answers

c. It is among the most known form of phytoplankton and are usually unicellular!
You can find them arranging themselves in shapes by making colonies.

Which of the following structures is NOT found in bacteria?A ribosome
B cytoplasm
C cell membrane
D nuclear membrane

Answers

D nuclear membrane since bacteria is a prokaryote which means it does not have a nuclear membrane

Pretty sure the Answer is D

What is an explanation of why producers are always found at the lowest trophic level?

Answers

Producers are always found at the lowest trophic level because they are the foundation of the foodweb. Which means that in the ocean you will find producers like algae and fungi because they dwell in the bottom as producers.

Body cells divide by mitosis, and gametes are formed by meiosis.

A. True
B. False

Answers

True

This would help!
When a cell divides by way of meiosis, it produces four cells, called gametes.Gametes are more commonly called sperm in males and eggs in females. Unlike in mitosis, the gametes produced by meiosis are not clones of the original cell, because each gamete has exactly half as many chromosomes as the original cell.

A bone is tested, and its C-14 to C-12 ratio is nearly identical to that of the bones of living animals. What can be said about the bone's absolute age?a. It is 5,730 years old.
b. It is much less than 5,730 years old.
c. It is slightly less than 5,730 years old.
d. It is slightly more than 5,730 years old.

Answers

Answer=B

The half life of C-14 is 5,730 years. Seeing as the C-12 C-14 ratio is nearly the same, the tested bone is much younger than 5,730 years old.

B. It is much less than 5,750 years old.

Hope it helps.

The DNA in a cell's nucleus encodes proteins that are eventually targeted to every membrane and compartment in the cell, as well as proteins that are targeted for secretion from the cell.For example, consider these two proteins:1. Phosphofructokinase (PFK) is an enzyme that functions in the cytoplasm duringglycolysis.2. Insulin, a protein that regulates blood sugar levels, is secreted from specializedpancreatic cells.Assume that you can track the cellular locations of these two proteins from the time that translation is complete until the proteins reach their final destinations.For each protein, identify its targeting pathway: the sequence of cellular locations in which the protein is found from when translation is complete until it reaches its final (functional) destination. (Note that if an organelle is listed in a pathway, the location implied is inside the organelle, not in the membrane that surrounds the organelle.)Options:Cytoplasm only, ER --> cytoplasm, ER --> Golgi --> outside cell, cytoplasm --> ER --> outside cell, Golgi --> ER --> outside cell, cytoplasm --> Golgi --> outside cell, nucleus --> cytoplasm, ER --> Golgi --> cytoplasm

Answers

Answer:

PFK (protein): cytoplasm only

Insulin (protein): ER->Golgi->outside cell

Explanation:
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Anna is observing slides of unlabeled organisms. The organisms are unicellular, have delicate glass-like cell walls with sculpturing, and show all the cell organelles, including chloroplasts. Which organism is she observing?