Hey Hey!
Hmm... This seems to be a simple questions. Plants/trees actually make their own carbohydrates through photosynthesis. A fox simply eats food and that is their carbohydrate source. Please mark brianliest<3!
Sex... I think ? Is it multiple choice
<span>This leads to variation in a species. This will be how some traits are expressed during a subsequent generation and other traits will be recessed. The genetic basis will allow some traits to eventually appear and others to hide themselves until they become dominant again.</span>
Answer:
This technique is called in-vitro fertilization.
Explanation:
In-vitro fertilization (IVF) refers to a form of assisted-reproduction technology in which the encounter of male and female gametes takes place outside the female organism (such as a human patient, in this case). IVF may be employed in several situations, including:
- Abnormalities in the female reproductive tract which impair the flow of the ovum into the uterine cavity (e.g. blocked fallopian tubes).
- Abnormally low sperm counts.
- Surrogate pregnancy.
Answer:
d. all endothelial cells would be venous
Explanation:
The Notch signaling pathway is a cell signaling system which consist basically of 4 NOTCH genes ( NOTCH1, NOTCH2, NOTCH3, and NOTCH4) each of them having the information to build a particular cell membrane receptor protein.
It has been demonstrated in zebrafish embryos that Notch signaling are highly determinant factors during vascular development, and a key function of these genes was specifically to regulate the differentiation of arterial fate in endothelial cells.
Notch signaling-deficient embryos showed a loss of expression of arterial markers such as ephrinB2 from arterial vessels with an accompanying expansion of venous markers into normally arterial domains. In contrast, embryos in which Notch signaling had been ectopically activated, meaning an activation out of "proper" place (where not expected, e.g. venous endothelial), exhibited the contrary phenotype, this is a suppression of vein-specific markers with ectopic expression of arterial markers in venous vessels.
To summarize, when Notch is supressed (in this case inhibited with a specific Notch inhibitor) arterial fate of endothelium is not followed, and venous fate is stablished. Thus, endothelial cells (those expected to form venous tissues but also arterial ones) would specified as venous.
