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
Daniel [21]
3 years ago
5

(14 points) What nationwide step that greatly reduced dangerous automobile emissions was mandated by the U.S. Clean Air Act?

Biology
2 answers:
kirill [66]3 years ago
8 0

Using electricity instead of fossil fuels

vampirchik [111]3 years ago
3 0

Answer: a

Explanation:

You might be interested in
Calcium levels in the body are maintained by hormones. If the blood calcium level rises above a set point, calcitonin is secrete
Inga [223]

Answer:

positive feedback

Explanation:Because when you get motion that means its positive but if doesn't feel motion than that is negative.

6 0
3 years ago
In humans, the quadriceps muscle is a skeletal leg muscle under voluntary control. As such, it contracts in response to signals
Masja [62]

Answer:

The correct answer is - operation of reflex arc.

Explanation:

The reflex arc is a unique and special type of neural pathway that starts with a sensory neuron and ends with a motor neuron. In this operation sensory neuron acts as the receptor and motor neuron is effector. This type of neural circuit helps in faster response.

Voluntary muscles like quadriceps muscle are normally in control voluntarily however, such muscle may contract involuntary due to reflex arc. This type of contraction takes place before the signal has even reached the brain.

In this response the sensory neuron takes the signal to the spinal cord and then motor neuron to the effector muscle for faster response.

Thus, the correct answer is - operation of reflex arc.

8 0
3 years ago
Cartography is the science of A. mapmaking. End of exam B. the prime meridian. C. cartoon graphics. D. the solar system.
Anit [1.1K]
The answer to your question is A
3 0
3 years ago
Read 2 more answers
PLEASE HELP!!!!!! 50 POINTS
rusak2 [61]

Answer:

Molluscs have more varied forms than any other animal phylum. They include snails, slugs and other gastropods; clams and other bivalves; squids and other cephalopods; and other lesser-known but similarly distinctive subgroups. Although it is impossible to know the subjective experience of another animal with certainty, the balance of the evidence suggests that most invertebrates do not feel pain. The evidence is most robust for insects, and, for these animals, the consensus is that they do not feel pain. In general, mollusks have 3 body regions: a head, a visceral mass, and a "foot." The head contains the sense organs and "brain," while the visceral mass contains the internal organs. Mollusks usually have a shell (although some do not). Mollusks also have an extension of the body wall called the mantle.

Explanation:

6 0
2 years ago
The finding that ___ can cause channel-swapping is consistent with early filter theories of auditory attentional selection.
kap26 [50]
"different ears"
According to <span>Broadbent's  study, depending on which ear the stimulus was done, one of the channels were used. If both ears were used then there was a channel-swapping phenomenon that proved his theory of auditory attentional selection.</span>
6 0
3 years ago
Other questions:
  • Suppose a star is about 38,000,000,000,000 kilometers away from Earth. How do you write this number in scientific notation?
    5·2 answers
  • Explain how epithelial and connective tissues combine to form four types of membranes
    7·1 answer
  • Sarah recently learned about performing a cost–benefit analysis while studying environmental policies. Help her choose the right
    8·2 answers
  • The atomic number of an atom is the number of _________.
    10·2 answers
  • How do hair-like structures increase the surface area of the root hair cell?
    15·1 answer
  • ILL GIVE YOU 60 POINTS &amp;BRAINLIEST
    13·2 answers
  • What element has fewer valence electrons than magnesium
    9·1 answer
  • Answer The following with ᵒF and ᵒC.
    9·1 answer
  • What is activated by the sympathetic system?
    15·1 answer
  • I need help sooo much. I really appreciate it
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!