1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kondor19780726 [428]
3 years ago
10

Index fossils are the remains of species that existed on earth for relatively short periods of time. True or False? Why

Biology
1 answer:
BartSMP [9]3 years ago
5 0

Answer:

Depends

Explanation:

Because some animals or things that left fossils behind might have been there since the beggining of time and some just so happened to develp over time -like dinos im guessing.

You might be interested in
Which are units used to express volume ?
Lorico [155]
Liters/cl/ml/dl for liquids and cubic meters/cm/mm/km for solids
4 0
3 years ago
Read 2 more answers
How does leaf structure best represent the relationship between structure and function? It indicates the maximum height an organ
vova2212 [387]

Answer:

The correct answer is - *It relates directly to the characteristics of the plant's environment*

Explanation:

The relationship between structure and function can be represented by the leaf structure as the structure of a particular plant leaf gives an idea about the characteristics of the environment it is habituated.

In the dry area or deserted area, leaves are modified into spikes to save water in order to lower transpiration, number of waxy coating, number of chlorophyll, and other modifications that give an idea about the environment and light intensity, and other characteristics.

6 0
4 years ago
What are two sources of organic waste that are produced by aquatic ecosystems?
Anna [14]
The two sources of organic wastes that are produces by aquatic system are Nitrogenous- Ammonia and the decaying remains.
Ecosystem in the body of water is known as aquatic ecosystem. there is also life in the water. Marine ecosystem and freshwater ecosystems are the two types of Aquatic Ecosystems. Lentic, lotic and wetlands are further types of freshwater ecosystem.
7 0
3 years ago
Genes for body color (B black dominant to b yellow) and wing shape (C straight dominant to c curved) are located on the same chr
xxMikexx [17]

Answer:

Map distance = Genetic distance, GD = 3.9 MU ≅ 4 MU

Explanation:

The more separated two genes are, the more chances of recombination there will be.  The closer they are, the fewer chances of recombination there will be. Two genes that are very close will have a few recombination events and are strongly bounded.    

To analyze the recombination frequency, we have to know that:

  • 1% of recombination = 1 map unit = 1centi Morgan = 1,000,000 base pairs.
  • And that the maximum recombination frequency is always 50%.  

The map unit is the distance between the pair of genes for which every 100 meiotic products one of them results in a recombinant one.  

Knowing that the genes are linked, we can calculate genetic distances between them. First, we need to identify the genotypes of the parental gametes with the ones of the recombinants. We can recognize the parental gametes in the descendants because their phenotypes are the most frequent, while the recombinants are the less frequent. So:

Parentals:

  • black, curved 337
  • yellow, straight 364

Recombinants:

  • Black, straight 17
  • yellow, curved 12

To calculate the recombination frequency we will make use of the next formula: P = Recombinant number / Total of individuals.

P = Recombinant number / Total of individuals.  

P = 17 + 12 / 337 + 364 + 17 + 12

P = 29 / 730

P = 0.039

The genetic distance (GD) will result from multiplying that recombination frequency (P) by 100 and expressing it in map units (MU).

GD = P x 100

GD = 0.039 x 100

GD = 3.9 MU ≅ 4 MU

3 0
3 years ago
Xavier has been using a workout app to track his progress at the gym. Lately, he has found that his average heart rate during ae
kipiarov [429]
The third option: Increase the intensity of cardiovascular workouts, is the right one. we know this because the rest of the options don't give the right fit. anaerobic workout is a short burst of energy, so it wouldn't be a good fit. Doing fewer aerobic workouts would lower it even more. Decreasing intensity of a cardiovascular workout would also cause a larger decrease. so it is the third option. Hope this helps a lot.
8 0
4 years ago
Other questions:
  • A firefighter wakes up in the middle of the night to the sound of an alarm. it is likely that her _____ have released epinephrin
    6·1 answer
  • Both aerobic cellular respiration and lactic acid fermentation produce ATP, though in different amounts. These two ATP-producing
    12·2 answers
  • Can someone explain what in organelle
    5·2 answers
  • eggs are used in alot of baking goods eaten over thanksgiving. eggs only have one set of chromosomes. list three vocabulary word
    5·1 answer
  • Are wetlands and estuaries more similar or different? Defend your opinion.
    6·1 answer
  • Which planets are often called the terrestrial planet's<br>​
    9·2 answers
  • How does the primary structure of proteins differ from the secondary structure?
    5·1 answer
  • Activities such as amino acid synthesis and active transport in plant cells are powered by
    7·2 answers
  • A scientist discovers that a soil bacterium he has been studying produces an antimicrobial that kills gram-negative bacteria. Sh
    15·1 answer
  • Can yeast replace itself with new cells
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!