Answer:
<u>Two ureters.</u>
These narrow tubes carry urine from the kidneys to the bladder. Muscles in the ureter walls continually tighten and relax forcing urine downward, away from the kidneys. If urine backs up, or is allowed to stand still, a kidney infection can develop.
Answer:
1) A
2) B
3) B
Explanation:
rain brings water back to Earth
water goes up to the sky in clouds
water has to go up before it becomes a cloud
Answer:
If they do not have what they need they will not be able to reproduce or grow.
Explanation:
Ecological systems often remain in balance if only one factor is altered.