Which one of these exhibits a dorsal nerve cord at some stage of its development?

A) A jellyfish

B) A bony fish

C) A snail

D) A grasshopper

Missense, nonsense, and silent mutations are examples of which type of mutation? A) substitution B) insertion C) deletion D) replication

Give the symbols for the elements that make up each of the following carbohydrates lipid s DNA proteins

Which mode of reproduction is exhibited by frogs A. viviparous B. Oviparous C. Ovoviviparous

In tropical climates, where strong insolation makes temperatures high, all that is needed for intense daily convectional storms is: in

which characteristic of a flatworms digestive system allows the flatworm to distribute nutrients to all body cells?

Which is produced immediately after a plant sperm cell fertilizes an egg cell? a. a zygote b. plant nutrients c. sweet nectar d. a spore

In modern classification system, unicellular organisms that contain chloroplasts and a nucleus would be considered; A) annelids B) protists C) archaea D) chordates

The northern copperhead is Agkistrodon contortrix contortrix, the southern copperhead is Agkistrodon contortrix mokasen, and the cottonmouth is Agkistrodon piscivorous. Therefore, A. all are subspecies of Agkistrodon. B.

What's a primary consumer

After plants absorb energy from the sun the energy gets converted into blank energy for the plant to carry out life activities