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
ziro4ka [17]
3 years ago
13

River dolphins are morphologically distinct from other dolphins and are primarily restricted to freshwater ecosystems in Asia an

d South America.
a. True
b. False
Biology
1 answer:
Stels [109]3 years ago
3 0

Answer:

a. True

Explanation:

  • The river dolphin is a group of aquatic animals that is specially adapted to the fresh water and are relatively smaller compared to the other dolphins.
  • They have evolved to survive in shallow waters and strong-river currents. These dolphins are not very widely disturbed and are found in certain deltas and rivers.
You might be interested in
2. How far apart are Y and L? Give your answer in map units.
oksano4ka [1.4K]
Hi there. Actually, there is no image provided so I can’t solve this question.
5 0
3 years ago
What would happen to the concentrastions if ATP , NADPH and sugars if ps1 stopped working
meriva

Answer:

The amount of energy of a wave can be determined by measuring its wavelength, the distance between consecutive points of a wave.

Visible light is a type of radiant energy within the electromagnetic spectrum; other types of electromagnetic radiation include UV, infrared, gamma, and radio rays as well as X-rays.

The difference between wavelengths relates to the amount of energy carried by them; short, tight waves carry more energy than long, wide waves.

6 0
4 years ago
Read 2 more answers
A protein's alpha helices and beta sheets fold together to create an overall shape at the _____ level of protein structure.
bogdanovich [222]
Tertiary structure :))))
3 0
3 years ago
What technology would you need to be able to live on Mars?
MAVERICK [17]

Answer:

  1. Nuclear Propulsion : The longer the journey, the more expensive, difficult, and dangerous the journey is. Fuel, life support systems, and food must all last this duration. So, to make the trip quicker, NASA is working on more effective propulsion systems - which use nuclear thermal propulsion.  Nuclear thermal propulsion provides twice the efficiency of current technology. A propellant like liquid hydrogen is heated up via a nuclear reactor. As the hydrogen is converted into gas, it provides thrust via a nozzle, propelling the spacecraft.
  2. Inflatable Heat Shields : n inflatable heat shield, like the one that NASA is developing, could improve this process drastically. Called the Low-Earth-Orbit Flight Test of an Inflatable Decelerator (LOFTID), this inflatable heat shield is six meters wide, made up of synthetic fibers 15 times stronger than steel, and is designed to unfold and inflate as the spacecraft enters Mars’ atmosphere. Taking up less space than a traditional heat shield, yet being larger on inflation, will enable us to land on Mars safely.
  3. High-tech Martian spacesuits : Future upgrades to address the differences on Mars may include technology for life support functionality in the carbon dioxide-rich atmosphere and modified outer garments to keep astronauts warm during the Martian winter and prevent overheating in the summer season.
  4. Martian home and lab on wheels : Much like an RV, the pressurized rover will have everything inside that astronauts need to live and work for weeks. They can drive in comfortable clothing, tens of miles from the spacecraft that will launch them back to space for the return trip to Earth. When they encounter interesting locations, astronauts can put on their high-tech spacesuits to exit the rover and collect samples and conduct science experiments.
  5. Uninterrupted power : Mars has a day and night cycle like Earth and periodic dust storms that can last for months, making nuclear fission power a more reliable option than solar power. NASA already tested the technology on Earth and demonstrated it is safe, efficient, and plentiful enough to enable long-duration surface missions. NASA plans to demonstrate and use the fission power system on the Moon first, then Mars.

Explanation:

3 0
3 years ago
Read 2 more answers
The first organisms evolved on Earth around 4 billion years ago. The fossil record indicates that the first organisms were which
Leokris [45]
The first organisms were <span>prokaryotes. </span>
8 0
4 years ago
Other questions:
  • How do plants transfer nitrogen in the nitrogen cycle?
    13·1 answer
  • Something that causes a population to decrease
    11·2 answers
  • Which term describes the difference in the concentrations of a substance across a cell’s membrane?
    8·2 answers
  • IQ scores have risen by how much each decade over the last fifty years?
    10·1 answer
  • Why was modern classification invented
    13·1 answer
  • Transpiration is kind of like a plant's –<br> atmosphere <br> nutrients<br> sweat<br> life cycle
    6·2 answers
  • Solve the equation of mava=mbvb max5.0ml=5.2mlx0.10m
    6·1 answer
  • How does waste removal in a fetus differ from waste removal after birth?
    7·1 answer
  • A student is investigating how substrate concentration affects the rate of anenzyme-catalyzed reaction. Which ​threevariables​ s
    5·1 answer
  • What is the one thing that puts tremendous pressure on our biodiversity and natural resources?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!