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Montano1993 [528]

3 years ago

5

The heart contracts twice for every heartbeat one contraction is the atrial contraction while the other is the venture true or f

alse

1 answer:

jeyben [28]3 years ago

8 0

Answer:

True. The heart contracts twice per heartbeat. One contraction is the ventricular and the other one is the artrial.

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Explanation:

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what is technology A.part of the scientific method B. computer, digital, and synthesized tools c. anything made by humans, as op

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3 years ago

List 3 factors that can speed up the rate of chemical reactions

zysi [14]

Answer:

Temperature
Greater Surface Area
Catalysts

Explanation:

Temperature

An increase in temperature typically increases the rate of reaction. An increase in temperature will raise the average kinetic energy of the reactant molecules. Therefore, a greater proportion of molecules will have the minimum energy necessary for an effective collision (Figure. 17.5 “Temperature and Reaction Rate”).

Greater Surface Area

The rate of a chemical reaction can be raised by increasing the surface area of a solid reactant. ... more particles are exposed to the other reactant. there are more collisions. the rate of reaction increases.

Catalysts

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Hope this help!!!

7 0

3 years ago

Read 2 more answers

If a female fruit fly heterozygous for red eyes (XRXr) crossed with a white-eyed male (XrY), what percent of their offspring wou

Crazy boy [7]

Answer:

50%

Explanation:

Hello!

We can observe that:

R red eyes

r white eyes

The possible gametes for the female are XR and Xr.

The possible gametes for the male are Xr and Y

Xr Y

XR XRXr XRY

Xr XrXr XrY

The expected offspring is:

a red-eyed female (XRXr)

a red-eyed male (XRY)

A female with white eyes (XrXr)

A white-eyed male (XrY)

Success in your homework!

8 0

3 years ago

In a short, detailed paragraph, please answer the following.

katovenus [111]

Answer:

Ans - 1 Photosynthesis begins with the light reactions. It is during these reactions that the energy from sunlight is absorbed by the pigment chlorophyll in the thylakoid membranes of the chloroplast.

Ans-2 The dark reactions of photosynthesis occur in the stroma of the chloroplast where they utilize the products of the light reaction. In the dark reaction, plants use carbon dioxide with ATP and NADPH from the light reactions to produce glucose.

Ans-3 The main factors affecting rate of photosynthesis are light intensity, carbon dioxide concentration and temperature.

5 0

3 years ago