Two students are studying plants. One is focusing on a speci…

Two students are studying plants. One is focusing on a species of plant that has cuticle, but no true roots or leaves. The gametophyte is the most often seen stage of the life cycle, and the sperm must swim through a film of water to reach the egg for reproduction. This student is studying a species of [a]. Another student is studying a plant where the sporophyte is the predominant stage of the life cycle. The plant has true roots and leaves and vascular tissue. It has cones for reproduction and produces pollen. After fertilization occurs, seeds form and are released from female cones. This student is studying a species of [b]. 

The diagram above shows several processes involved in replic…

The diagram above shows several processes involved in replicating a reverse-transcribing RNA virus from its genetic material.  Producing dsDNA (double-stranded DNA) from ssRNA requires [a]. Producing mRNA from dsDNA occurs via the process of [b]. In a bacterial cell, proteins are synthesized using information in mRNA by the [c].  

We’ll continue to use the same tree for this question. In th…

We’ll continue to use the same tree for this question. In this question, you will consider where in the tree certain characteristics evolved. Think this through logically; it may help to consider which groups have the feature indicated. Mitochondria first evolved at [a]. Chloroplasts with chlorophyll A and B first evolved at [b]. Movement by cytoplasmic streaming evolved at [c]. A silica-based protective outer cell casing evolved at [d]. A calcium carbonate protective outer cell casing evolved at [e].

Above is a phylogenetic tree of the major animal phyla. You…

Above is a phylogenetic tree of the major animal phyla. You don’t need to do anything with it, but you can refer to it to remind yourself of the phyla and help you answer this question. Below are descriptions of several animals. Based on the features given, identify which phylum the animal belongs to.