D) The AV valves are supported by chordae tendineae so that they do not blow back up into the atria during ventricular contraction.
To understand the phenomenon of biological cell
To understand which principal occurs
To know the whose are reactant and what makes product
Hope for brainliest mark
Answer: B. False
Explanation:
“Hox” genes are a highly conserved group of genes, all of whose products are transcription factors bearing a specific domain (called a ”homeodomain”). The transcriptional activity of a large amount of genes relevant to embryonic development is controlled by regulatory sites which are able to bind to this domain. Changes in the transcriptional activity of even a single Hox gene may thus have dramatic downstream effects on the phenotype, as this will result in several further genes having their transcription either enhanced or suppressed.
Answer:
A. to remove waste
Explanation:
The purpose of reproduction is to create offspring. Offspring will naturally carry the characteristics of the parents. When offspring are born they create the next generation and keep a species alive. The excretory system removes waste.
1. Replication
2. Hydrogen
3. Nucleotides
4. Thymine (T)
5. Cytosine (C)
6. Identical
7. Original
8. New
