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Alexxx [7]
3 years ago
10

Which of these vessels receives blood during ventricular systole? A) both the aorta and pulmonary trunk B) aorta only C) pulmona

ry arteries only D) pulmonary veins only
Biology
1 answer:
MrRissso [65]3 years ago
8 0

Answer:

a. both the aorta and pulmonary trunk

Explanation:

your welcome

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Which of the following represents organisms in a food chain?
Lisa [10]

Answer: c seeds, mice, snakes

Explanation:

<u>a hawks, owls, eagles NO</u>

These animals all eat some form of meat, and they are on the top of all of their food chains. If you put these animals in a room with no food, there'd be no food chain, and they would got out at each other until there was one left, and there'd be no advatanges because 1. they can all fly and 2. they are all top consumers. The same thing goes for D except hyenas can't fly.

<u>b deer, rabbits, cows NO</u>

This is not a food chain because all of the animals are herbivore, so they only eats plants and will not eat each other.

<u>c seeds, mice, snakes YES</u>

The seeds are a producer which is to be eaten by a consumer (the mouse), and which are then eaten by the predator, the snake.

<u>d hyenas, vultures, crows NO</u>

<u />

Hope this helps, now you know the answer and how to do it. HAVE A BLESSED AND WONDERFUL DAY! As well as a great Valentines Day! :-)  

- Cutiepatutie ☺❀❤

7 0
3 years ago
A lab technician provides you with a bacterial pellet labeled "G3". When you observe the pellet under UV light, there is little
umka21 [38]

Answer: The two possible explanation for the outcome are as follows:

Explanation:

1. The bacterial DNA in the pellet was not completely isolated properly, therefore, no fluorescence was observed in the pellet under the exposure of UV radiation.

2. After 3 hours of induction with the IPTG and labeling with the G3. The IPGT might not be able to bound to the bacterial DNA that could show response of fluorescence in the ultraviolet light.

4 0
3 years ago
Erosion and deposition constantly change Earth’s surface. Erosion carries natural materials like rock and soil from one place to
g100num [7]
D. Lava plateau
They are formed when lava flows from the volcano & build up over time as the molten lava is deposited & cools.
7 0
3 years ago
Why are old growth forests considered “healthy” ecosystems?
Pavlova-9 [17]
Because they have not been distrubed
6 0
3 years ago
Phosphofructokinase (PFK) is an enzyme that converts fructose 6-phosphate to fructose 1,6-bisphosphate, by adding a phosphate gr
erica [24]

Answer:

D. Allosteric activator

Explanation:

In an enzyme, the allosteric site is a site/motif different from the active site, (i.e., the site with catalytic activity) which is able to interact with regulatory effector molecules in order to activate or inhibit enzymatic activity by influencing the tridimensional (3D) structure of the enzyme. An allosteric activator is an effector molecule with the ability to bind to a specific enzyme at a different site than the active site, thereby modifying the shape of the enzyme and increasing the affinity of this enzyme for its substrate. Moreover, Adenosine monophosphate (AMP) is a nucleotide composed of a phosphate group, a sugar ribose, and an Adenine (A) base. This effector molecule (AMP) has shown to allosterically stimulate diverse enzymes in physiological conditions (e.g., AMP-activated protein kinase).

5 0
3 years ago
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