Answer:
Option A, most closely related to mammals
Explanation:
Insects like arthropods and molluscs have an open circulatory system and thus do have a distinguishable heart. Fish has two chambered heart. Reptiles have three chambered heart. Amphibians too have a three chambered heart.
All mammals and fish have four chambered heart. The right and left sides of the chambers have restricted entry and hence remain intact from each other
Hence, option A is correct
At times, a person may have experienced a sudden or unexpected change in body temperature within a 24-hour period. This change in the body temperature is caused by immune responses. If there is a detected infection in the body, the immune system fights back thus causing the change of body temperature.
Answer: A vascular bundle is a part of the transport system in vascular plants. A strand of conducting vessels in the stem or leaves of a plant, typically with phloem on the outside and xylem on the inside.
Hope this helps you!
Answer:
the answer is B rectus abdominis!!! i hope this helps
Explanation: