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zalisa [80]
2 years ago
10

Which gives nourishment to embryo sac??1) Tapetum2) Endosperm3) Thalamus4)Nucellus​

Biology
2 answers:
daser333 [38]2 years ago
8 0

Answer:

4 Nucellus

Explanation:

if u think right then follow me

Tanya [424]2 years ago
8 0
The Nucleus of the embryo gives nourishment. Therefore it is number 4
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Use Figure 1 to evaluate each trigonometric function of angle A . The side adjacent to angle A has length 8 and the side opposit
jonny [76]

The trigonometric ratios are;

  • Sin A = 0.78
  • Cos A = 0.625
  • Tan A =  1.25
<h3>What are the trigonometric ratio?</h3>

The trigonometric ratios are sine, cosine and tangent. Now we have the hypotenuse of the triangle. Figure 1 has been shown in the image attached to this answer.

c = √8^2 + 10^2

c = 12.8

sin A = 10/12.8 = 0.78

Cos A = 8/12.8 = 0.625

Tan A = 10/8  = 1.25

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7 0
1 year ago
Which is an example of a behavioral adaptation?
nignag [31]
The answer is D! birds have to migrate for winter to find an abundance of food! they learned this over time making it a learned adaptation
8 0
2 years ago
In fast-twitch oxidative-glycolytic fibers, their rapid increases in force rely on the ________ activity where rapid relaxation
Kitty [74]

Answer:

1. myosin ATPase

2. Ca2+-ATPase

Explanation:

ATPase activity of myosin head hydrolysis ATP and energize the myosin head. The energized myosin head forms cross bridges to facilitate the power stroke of muscle contraction. The fast-twitch oxidative-glycolytic fibers have the ability to produce ATP by aerobic respiration.  

These fibers have the  ATPase in their myosin heads that hydrolyze ATP three to five times faster than the myosin ATPase in slow fibers. This ensures the faster speed of contraction of these fast-twitch muscle fibers.

During their relaxation, Ca2+ ATPase pumps the calcium ions back to the sarcoplasmic reticulum. As the level of Ca2+ ions in the sarcoplasm decreases, calcium ions are released from troponin. Tropomyosin is allowed to cover the myosin-binding sites on actin and the muscle fiber relaxes faster.

4 0
3 years ago
What is a category of ai that attempts to emulate the way the human brain works?
KIM [24]

Category of AI that attempts to emulate the way the human brain works neural network.

A neural network is a biological neural network made up of biological neurons or an artificial neural network used to solve artificial intelligence (AI) problems.

Artificial neural networks model biological neuron connections as weights between nodes. An excitatory link is represented by a positive weight, whereas an inhibitory connection is represented by a negative weight. Each input is given a weight before being added together.

These artificial networks can be applied to adaptive control, predictive modelling, and other tasks where a dataset can be utilised to train them.

To learn more about artificial intelligence, refer this link brainly.com/question/28448080

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8 0
11 months ago
True or false the consumption of irradiated food during pregnancy can cause birth defects
guajiro [1.7K]

Consumption of irradiated food during pregnancy can cause birth defects is false.

<h3>What are birth defects?</h3>

Birth defect in pregnancy are the structural or functional abnormalities occur during intrauterine stage. It can be detected either prenatally or in infancy state.

The primary causes are genetic, Socioeconomic, Environmental and other factors.

Chromosomal abnormalities and single gene defects are the major genetic abnormality based birth defects, such as Down syndrome and cystic fibrosis etc.

When parents are related by their blood group can also leads to high risk of rare  genetic birth defects.

Hence, the statement is false

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8 0
1 year ago
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