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
muminat
3 years ago
15

Question 4 of 10

Biology
2 answers:
Marta_Voda [28]3 years ago
6 0

Answer:

B

Explanation:

A child needs a beating heart to live, if not they cam't develop.

Amanda [17]3 years ago
3 0
The heart begins beating, b
You might be interested in
which description represents the effects of osmosis on a plant cell when the concentration of sugar particles is greater inside
salantis [7]

Answer:

The diffusion of water through a selectively permeable membrane is called osmosis. Which description represents the effects of osmosis on a plant cell when the concentration of sugar particles is greater inside the cell than outside? Water moves into and out of the cell at equal rates, and cell size remains the same.

Explanation:

8 0
3 years ago
Testosterone oxi-reductase is a liver enzyme that regulates testosterone levels in alligators. one study compared testosterone o
Reil [10]

Explanation:

Environmental contamination reduces total testosterone oxido-reductase activity in females.- <u>True</u>

Enzymes are proteins which catalyze reactions by acting on substrates in order to speed up reactions- like the breakdown of large polysaccharides by amylase. Here, the enzyme testosterone oxi-reductase facilitates the of testosterone to the androgen DHT. Enzyme specificity is affected by pH, temperature and the presence of inhibitors.

In temperatures beyond its optimal range, these may undergo changes to its physical structure called denaturation; when denatured, enzymes lose their ability to bind specifically to their substrate -i.e. substrate binding specificity is lost. Testosterone would no longer be able to bind to the active site, and thus would not be converted.

Learn more about cellular life at brainly.com/question/11259903

Learn more about proteins and carbohydrates at brainly.com/question/10744528

#LearnWithBrainly

6 0
3 years ago
What happens to the amount of energy as it moves up through an energy pyramid?
MissTica

Answer: some energy is lost from the pyramid, energy is transferred from bottom (producers) to top, but in decreasing amounts.

Explanation: total energy is conserved, but not necessarily within the energy pyramid, which is an open system where energy is lost from the pyramid, mainly as heat but also as sound.

Energy is transferred up the pyramid but the amount transferred at each stage is less because of losses outside the pyramid.

6 0
3 years ago
One kind of radiation not released by radioactive decay is ______.
aalyn [17]
One kind of radiation not released by radioactive decay is radiation
4 0
3 years ago
In areas of permafrost, stands of black spruce are frequently observed in the landscape, while other tree species are noticeably
Marizza181 [45]

This happens because taproot formation is impossible, so trees developed shallow root beds.

Permafrost is soil that has a temperature below 0 °C (for about two years) and forms a solid matrix which can extend to a depth of hundreds of meters. Because of this structure the permafrost prevents trees from developing deep root systems. As a consequence, the shallow root bed of trees such as black spruce, causes them to lean or even fall.


8 0
3 years ago
Other questions:
  • What is meant by the term classification
    10·1 answer
  • Why does the human body maintain a constant pH of its blood
    9·1 answer
  • What types of adaptations would help organisms living in the high intertidal zone of a sandy beach survive?
    7·2 answers
  • What are the 2 main regions of the ocean floor?
    9·2 answers
  • Study the population growth curve of three species of squirrels on an island. Red squirrels and gray squirrels have been the nat
    11·2 answers
  • Assume there are 1000 units of energy in the producer level of the energy pyramid. How many units of energy are available at eac
    6·2 answers
  • Hair occur in all mammal except those of rodentia , chiroptera , primata , cetacea​
    12·2 answers
  • The pelican's beak is adapted for _________ in __________ .
    12·1 answer
  • Which mammal didnt become extinct during the Cenoozoic era
    6·1 answer
  • I WILL GIVE BRAINLIEST FOR CORRECT ANSWER
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!